{"nessus": [{"lastseen": "2023-05-17T16:34:13", "description": "The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3099 advisory.\n\n - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci_write() operations. A guest OS user can crash the QEMU process. (CVE-2020-13253)\n\n - In QEMU 4.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference. (CVE-2020-15469)\n\n - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)\n\n - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not checked. (CVE-2020-25084)\n\n - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)\n\n - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host controller driver. (CVE-2020-25624)\n\n - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)\n\n - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service. (CVE-2020-25723)\n\n - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)\n\n - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.\n This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)\n\n - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.\n (CVE-2020-28916)\n\n - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length. (CVE-2020-29129)\n\n - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer index is not validated. (CVE-2020-29443)\n\n - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.\n The highest threat from this vulnerability is to system availability. (CVE-2020-35505)\n\n - A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability. (CVE-2021-20181)\n\n - A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20196)\n\n - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20257)\n\n - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-3416)\n\n - A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory. (CVE-2021-3507)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service. (CVE-2021-3527)\n\n - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while handling a PVRDMA_CMD_CREATE_MR command due to improper memory remapping (mremap). This flaw allows a malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to system availability. (CVE-2021-3582)\n\n - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-3607)\n\n - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest and may result in a crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest threat from this vulnerability is to system availability. (CVE-2021-3608)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of- bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host. (CVE-2021-3713)\n\n - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process. (CVE-2021-3748)\n\n - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.\n (CVE-2021-3930)\n\n - A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process. (CVE-2021-4206)\n\n - A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process. (CVE-2021-4207)\n\n - A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.\n Affected QEMU versions <= 6.2.0. (CVE-2022-26354)\n\n - softmmu/physmem.c in QEMU through 7.0.0 can perform an uninitialized read on the translate_fail path, leading to an io_readx or io_writex crash. (CVE-2022-35414)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.", "cvss3": {}, "published": "2022-09-05T00:00:00", "type": "nessus", "title": "Debian DLA-3099-1 : qemu - LTS security update", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-13253", "CVE-2020-15469", "CVE-2020-15859", "CVE-2020-25084", "CVE-2020-25085", "CVE-2020-25624", "CVE-2020-25625", "CVE-2020-25723", "CVE-2020-27617", "CVE-2020-27821", "CVE-2020-28916", "CVE-2020-29129", "CVE-2020-29443", "CVE-2020-35504", "CVE-2020-35505", "CVE-2021-20181", "CVE-2021-20196", "CVE-2021-20203", "CVE-2021-20221", "CVE-2021-20257", "CVE-2021-3392", "CVE-2021-3416", "CVE-2021-3507", "CVE-2021-3527", "CVE-2021-3582", "CVE-2021-3607", "CVE-2021-3608", "CVE-2021-3682", "CVE-2021-3713", "CVE-2021-3748", "CVE-2021-3930", "CVE-2021-4206", "CVE-2021-4207", "CVE-2022-26354", "CVE-2022-35414"], "modified": "2023-01-04T00:00:00", "cpe": ["p-cpe:/a:debian:debian_linux:qemu", "p-cpe:/a:debian:debian_linux:qemu-block-extra", "p-cpe:/a:debian:debian_linux:qemu-guest-agent", "p-cpe:/a:debian:debian_linux:qemu-kvm", "p-cpe:/a:debian:debian_linux:qemu-system", "p-cpe:/a:debian:debian_linux:qemu-system-arm", "p-cpe:/a:debian:debian_linux:qemu-system-common", "p-cpe:/a:debian:debian_linux:qemu-system-data", "p-cpe:/a:debian:debian_linux:qemu-system-gui", "p-cpe:/a:debian:debian_linux:qemu-system-mips", "p-cpe:/a:debian:debian_linux:qemu-system-misc", "p-cpe:/a:debian:debian_linux:qemu-system-ppc", "p-cpe:/a:debian:debian_linux:qemu-system-sparc", "p-cpe:/a:debian:debian_linux:qemu-system-x86", "p-cpe:/a:debian:debian_linux:qemu-user", "p-cpe:/a:debian:debian_linux:qemu-user-binfmt", "p-cpe:/a:debian:debian_linux:qemu-user-static", "p-cpe:/a:debian:debian_linux:qemu-utils", "cpe:/o:debian:debian_linux:10.0"], "id": "DEBIAN_DLA-3099.NASL", "href": "https://www.tenable.com/plugins/nessus/164678", "sourceData": "#%NASL_MIN_LEVEL 80900\n#\n# (C) Tenable, Inc.\n#\n# The descriptive text and package checks in this plugin were\n# extracted from Debian Security Advisory dla-3099. The text\n# itself is copyright (C) Software in the Public Interest, Inc.\n#\n\ninclude('compat.inc');\n\nif (description)\n{\n script_id(164678);\n script_version(\"1.4\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2023/01/04\");\n\n script_cve_id(\n \"CVE-2020-13253\",\n \"CVE-2020-15469\",\n \"CVE-2020-15859\",\n \"CVE-2020-25084\",\n \"CVE-2020-25085\",\n \"CVE-2020-25624\",\n \"CVE-2020-25625\",\n \"CVE-2020-25723\",\n \"CVE-2020-27617\",\n \"CVE-2020-27821\",\n \"CVE-2020-28916\",\n \"CVE-2020-29129\",\n \"CVE-2020-29443\",\n \"CVE-2020-35504\",\n \"CVE-2020-35505\",\n \"CVE-2021-3392\",\n \"CVE-2021-3416\",\n \"CVE-2021-3507\",\n \"CVE-2021-3527\",\n \"CVE-2021-3582\",\n \"CVE-2021-3607\",\n \"CVE-2021-3608\",\n \"CVE-2021-3682\",\n \"CVE-2021-3713\",\n \"CVE-2021-3748\",\n \"CVE-2021-3930\",\n \"CVE-2021-4206\",\n \"CVE-2021-4207\",\n \"CVE-2021-20181\",\n \"CVE-2021-20196\",\n \"CVE-2021-20203\",\n \"CVE-2021-20221\",\n \"CVE-2021-20257\",\n \"CVE-2022-26354\",\n \"CVE-2022-35414\"\n );\n script_xref(name:\"IAVB\", value:\"2020-B-0041-S\");\n script_xref(name:\"IAVB\", value:\"2020-B-0063-S\");\n script_xref(name:\"IAVB\", value:\"2020-B-0026-S\");\n script_xref(name:\"IAVB\", value:\"2020-B-0075-S\");\n\n script_name(english:\"Debian DLA-3099-1 : qemu - LTS security update\");\n\n script_set_attribute(attribute:\"synopsis\", value:\n\"The remote Debian host is missing one or more security-related updates.\");\n script_set_attribute(attribute:\"description\", value:\n\"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the\ndla-3099 advisory.\n\n - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read\n during sdhci_write() operations. A guest OS user can crash the QEMU process. (CVE-2020-13253)\n\n - In QEMU 4.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer\n dereference. (CVE-2020-15469)\n\n - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e\n packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)\n\n - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not\n checked. (CVE-2020-25084)\n\n - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c\n mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)\n\n - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host\n controller driver. (CVE-2020-25624)\n\n - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)\n\n - A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while\n processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user\n within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host,\n resulting in a denial of service. (CVE-2020-25723)\n\n - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest\n can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)\n\n - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.\n This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO\n operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial\n of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)\n\n - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.\n (CVE-2020-28916)\n\n - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of\n header data even if that exceeds the total packet length. (CVE-2020-29129)\n\n - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer\n index is not validated. (CVE-2020-29443)\n\n - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of\n service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in\n versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw\n allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.\n The highest threat from this vulnerability is to system availability. (CVE-2020-35505)\n\n - A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This\n flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges\n on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as\n system availability. (CVE-2021-20181)\n\n - A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while\n processing read/write ioport commands if the selected floppy drive is not initialized with a block device.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of\n service. The highest threat from this vulnerability is to system availability. (CVE-2021-20196)\n\n - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It\n may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A\n privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of\n QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an\n interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said\n issue while updating controller state fields and their subsequent processing. A privileged guest user may\n use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing\n transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid\n values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The\n highest threat from this vulnerability is to system availability. (CVE-2021-20257)\n\n - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI\n I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req'\n from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the\n host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions\n up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get\n bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the\n host resulting in DoS scenario. (CVE-2021-3416)\n\n - A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could\n occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the\n floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on\n the host resulting in DoS scenario, or potential information leakage from the host memory. (CVE-2021-3507)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a\n single, large transfer request, to reduce the overhead and improve performance. The combined size of the\n bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper\n validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the\n array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a\n denial of service. (CVE-2021-3527)\n\n - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while\n handling a PVRDMA_CMD_CREATE_MR command due to improper memory remapping (mremap). This flaw allows a\n malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to\n system availability. (CVE-2021-3582)\n\n - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions\n prior to 6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest due to\n improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount\n of memory, resulting in a denial of service. The highest threat from this vulnerability is to system\n availability. (CVE-2021-3607)\n\n - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to\n 6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest and may result in a\n crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest\n threat from this vulnerability is to system availability. (CVE-2021-3608)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs\n when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A\n malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,\n resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions\n prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-\n bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this\n flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3713)\n\n - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the\n descriptor's address belongs to the non direct access region, due to num_buffers being set after the\n virtqueue elem has been unmapped. 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This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-3416)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service. (CVE-2021-3527)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user- gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost- user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host. (CVE-2021-3545)\n\n - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process. (CVE-2021-3546)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3593)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3595)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of- bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host. 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It\n may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A\n privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of\n QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an\n interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said\n issue while updating controller state fields and their subsequent processing. A privileged guest user may\n use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI\n I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req'\n from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the\n host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions\n up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get\n bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the\n host resulting in DoS scenario. (CVE-2021-3416)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a\n single, large transfer request, to reduce the overhead and improve performance. The combined size of the\n bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper\n validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the\n array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a\n denial of service. (CVE-2021-3527)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions\n up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-\n gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of\n QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-\n user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit\n this issue to leak memory from the host. (CVE-2021-3545)\n\n - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of\n QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET'\n command from the guest. It could allow a privileged guest user to crash the QEMU process on the host,\n resulting in a denial of service condition, or potential code execution with the privileges of the QEMU\n process. (CVE-2021-3546)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the bootp_input() function and could occur while processing a udp packet that is smaller than\n the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of\n uninitialized heap memory from the host. The highest threat from this vulnerability is to data\n confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the\n size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory\n disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw\n affects libslirp versions prior to 4.6.0. (CVE-2021-3593)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the\n size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory\n disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw\n affects libslirp versions prior to 4.6.0. (CVE-2021-3595)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs\n when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A\n malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,\n resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions\n prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-\n bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this\n flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the\n host. 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(CVE-2019-12067)\n\n - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation. (CVE-2020-13754)\n\n - QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case. (CVE-2020-25085)\n\n - pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer. (CVE-2020-25742)\n\n - hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call. (CVE-2020-25743)\n\n - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)\n\n - A flaw was found in the memory management API of QEMU during the initialization of a memory region cache.\n This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0. (CVE-2020-27821)\n\n - ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length. (CVE-2020-29129)\n\n - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer index is not validated. (CVE-2020-29443)\n\n - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.\n The highest threat from this vulnerability is to system availability. (CVE-2020-35505)\n\n - A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability. (CVE-2021-20181)\n\n - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-3416)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service. (CVE-2021-3527)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user- gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost- user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host. (CVE-2021-3545)\n\n - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process. (CVE-2021-3546)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3593)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3595)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of- bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host. 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It\n may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A\n privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of\n QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an\n interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said\n issue while updating controller state fields and their subsequent processing. A privileged guest user may\n use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI\n I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req'\n from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the\n host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.\n (CVE-2021-3392)\n\n - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions\n up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get\n bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the\n host resulting in DoS scenario. (CVE-2021-3416)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a\n single, large transfer request, to reduce the overhead and improve performance. The combined size of the\n bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper\n validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the\n array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a\n denial of service. (CVE-2021-3527)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions\n up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-\n gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of\n QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-\n user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit\n this issue to leak memory from the host. (CVE-2021-3545)\n\n - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of\n QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET'\n command from the guest. It could allow a privileged guest user to crash the QEMU process on the host,\n resulting in a denial of service condition, or potential code execution with the privileges of the QEMU\n process. (CVE-2021-3546)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the bootp_input() function and could occur while processing a udp packet that is smaller than\n the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of\n uninitialized heap memory from the host. The highest threat from this vulnerability is to data\n confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the\n size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory\n disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw\n affects libslirp versions prior to 4.6.0. (CVE-2021-3593)\n\n - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw\n exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the\n size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory\n disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw\n affects libslirp versions prior to 4.6.0. (CVE-2021-3595)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs\n when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A\n malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,\n resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions\n prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-\n bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this\n flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the\n host. 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A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.(CVE-2021-3416)\n\n - An infinite loop flaw was found in the USB OHCI controller emulator of QEMU. This flaw occurs while servicing OHCI isochronous transfer descriptors (TD) in the ohci_service_iso_td routine, as it retires a TD if it has passed its time frame. It does not check if the TD was already processed and holds an error code in TD_CC. This issue may happen if the TD list has a loop.\n This flaw allows a guest user or process to consume CPU cycles on the host, resulting in a denial of service.(CVE-2020-25625)\n\n - An infinite loop flaw was found in the e1000e device emulator in QEMU. This issue could occur while receiving packets via the e1000e_write_packet_to_guest() routine, if the receive(RX) descriptor has a NULL buffer address. This flaw allows a privileged guest user to cause a denial of service. The highest threat from this vulnerability is to system availability.(CVE-2020-28916)\n\n - An assert(3) failure flaw was found in the networking helper functions of QEMU. This vulnerability can occur in the eth_get_gso_type() routine if a packet does not have a valid networking L3 protocol (ex. IPv4, IPv6) value. This flaw allows a guest user to crash the QEMU process on the host, resulting in a denial of service.(CVE-2020-27617)\n\n - A use-after-free flaw was found in the USB(xHCI/eHCI) controller emulators of QEMU. This flaw occurs while setting up the USB packet as a usb_packet_map() routine and returns an error that was not checked. This flaw allows a guest user or process to crash the QEMU process, resulting in a denial of service.(CVE-2020-25084)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. 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The highest threat from this vulnerability is to system availability.(CVE-2020-35504)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.(CVE-2021-20221)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the(CVE-2021-3527)\n\n - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not checked.(CVE-2020-25084)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.(CVE-2020-35505)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.\n (CVE-2021-3545)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime.(CVE-2021-3544)\n\n - A flaw was found in vhost-user-gpu of QEMU in versions up to and including 6.0. An out-of-bounds write vulnerability can allow a malicious guest to crash the QEMU process on the host resulting in a denial of service or potentially execute arbitrary code on the host with the privileges of the QEMU process. 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'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-seabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-sgabios-8-70.59.1', 'sp':'0', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-vgabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-x86-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15']},\n {'reference':'qemu-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-arm-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-arm-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-block-curl-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-curl-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-curl-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-curl-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-iscsi-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-iscsi-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-iscsi-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-iscsi-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-rbd-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-rbd-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-rbd-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-rbd-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-ssh-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-ssh-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-ssh-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-block-ssh-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-guest-agent-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-guest-agent-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-guest-agent-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-guest-agent-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-ipxe-1.0.0+-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-ipxe-1.0.0+-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-kvm-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-kvm-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-seabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-seabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-sgabios-8-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-sgabios-8-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-vgabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-vgabios-1.11.0_0_g63451fc-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-x86-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15']},\n {'reference':'qemu-x86-2.11.2-70.59.1', 'sp':'0', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-15', 'SLE_HPC-LTSS-release-15', 'sles-ltss-release-15']},\n {'reference':'qemu-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-block-curl-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-block-iscsi-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-block-rbd-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-block-ssh-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-guest-agent-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-kvm-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-lang-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-s390-2.11.2-70.59.1', 'sp':'0', 'cpu':'s390x', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']},\n {'reference':'qemu-tools-2.11.2-70.59.1', 'sp':'0', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-ltss-release-15']}\n];\n\nvar ltss_caveat_required = FALSE;\nvar flag = 0;\nforeach var package_array ( pkgs ) {\n var reference = NULL;\n var _release = NULL;\n var sp = NULL;\n var _cpu = NULL;\n var exists_check = NULL;\n var rpm_spec_vers_cmp = NULL;\n if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];\n if (!empty_or_null(package_array['release'])) _release = package_array['release'];\n if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];\n if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];\n if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];\n if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];\n if (reference && _release) {\n if (exists_check) {\n var check_flag = 0;\n foreach var check (exists_check) {\n if (!rpm_exists(release:_release, rpm:check)) continue;\n if ('ltss' >< tolower(check)) ltss_caveat_required = TRUE;\n check_flag++;\n }\n if (!check_flag) continue;\n }\n if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;\n }\n}\n\nif (flag)\n{\n var ltss_plugin_caveat = NULL;\n if(ltss_caveat_required) ltss_plugin_caveat = '\\n' +\n 'NOTE: This vulnerability check contains fixes that apply to\\n' +\n 'packages only available in SUSE Enterprise Linux Server LTSS\\n' +\n 'repositories. Access to these package security updates require\\n' +\n 'a paid SUSE LTSS subscription.\\n';\n security_report_v4(\n port : 0,\n severity : SECURITY_WARNING,\n extra : rpm_report_get() + ltss_plugin_caveat\n );\n exit(0);\n}\nelse\n{\n var tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu / qemu-arm / qemu-block-curl / qemu-block-iscsi / etc');\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-07-14T14:38:44", "description": "The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3635-1 advisory.\n\n - A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-35503)\n\n - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.\n The highest threat from this vulnerability is to system availability. (CVE-2020-35505)\n\n - A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process. (CVE-2020-35506)\n\n - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service. (CVE-2021-3527)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of- bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host. (CVE-2021-3713)\n\n - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process. 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The highest threat from this vulnerability is to system availability. (CVE-2021-20255)\n\n - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a\n single, large transfer request, to reduce the overhead and improve performance. The combined size of the\n bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper\n validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the\n array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a\n denial of service. (CVE-2021-3527)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs\n when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A\n malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,\n resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3682)\n\n - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions\n prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-\n bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this\n flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the\n host. (CVE-2021-3713)\n\n - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the\n descriptor's address belongs to the non direct access region, due to num_buffers being set after the\n virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a\n denial of service condition, or potentially execute code on the host with the privileges of the QEMU\n process. 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(CVE-2019-12067)\n\n - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)\n\n - QEMU 5.0.0 has a use-after-free in hw/usb/hcd-xhci.c because the usb_packet_map return value is not checked. (CVE-2020-25084)\n\n - pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer. (CVE-2020-25742)\n\n - hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call. (CVE-2020-25743)\n\n - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)\n\n - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.\n The highest threat from this vulnerability is to system availability. (CVE-2020-35505)\n\n - A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device.\n This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20196)\n\n - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.\n (CVE-2021-20203)\n\n - An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario. (CVE-2021-20221)\n\n - A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-20255)\n\n - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user- gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)\n\n - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost- user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host. (CVE-2021-3545)\n\n - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process. (CVE-2021-3546)\n\n - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. (CVE-2021-3682)\n\n - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process. (CVE-2021-3748)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. 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qemu - security update
