## Releases
* Ubuntu 21.04
* Ubuntu 20.10
* Ubuntu 20.04 LTS
* Ubuntu 18.04 ESM
## Packages
* qemu \- Machine emulator and virtualizer
Lei Sun discovered that QEMU incorrectly handled certain MMIO operations.
An attacker inside the guest could possibly use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2020-15469)
Wenxiang Qian discovered that QEMU incorrectly handled certain ATAPI
commands. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 21.04. (CVE-2020-29443)
Cheolwoo Myung discovered that QEMU incorrectly handled SCSI device
emulation. An attacker inside the guest could possibly use this issue to
cause QEMU to crash, resulting in a denial of service. (CVE-2020-35504,
CVE-2020-35505, CVE-2021-3392)
Alex Xu discovered that QEMU incorrectly handled the virtio-fs shared file
system daemon. An attacker inside the guest could possibly use this issue
to read and write to host devices. This issue only affected Ubuntu 20.10.
(CVE-2020-35517)
It was discovered that QEMU incorrectly handled ARM Generic Interrupt
Controller emulation. An attacker inside the guest could possibly use this
issue to cause QEMU to crash, resulting in a denial of service. This issue
only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.
(CVE-2021-20221)
Alexander Bulekov, Cheolwoo Myung, Sergej Schumilo, Cornelius Aschermann,
and Simon Werner discovered that QEMU incorrectly handled e1000 device
emulation. An attacker inside the guest could possibly use this issue to
cause QEMU to hang, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.
(CVE-2021-20257)
It was discovered that QEMU incorrectly handled SDHCI controller emulation.
An attacker inside the guest could use this issue to cause QEMU to crash,
resulting in a denial of service, or possibly execute arbitrary code. In
the default installation, when QEMU is used in combination with libvirt,
attackers would be isolated by the libvirt AppArmor profile.
(CVE-2021-3409)
It was discovered that QEMU incorrectly handled certain NIC emulation
devices. An attacker inside the guest could possibly use this issue to
cause QEMU to hang or crash, resulting in a denial of service. This issue
only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.
(CVE-2021-3416)
Remy Noel discovered that QEMU incorrectly handled the USB redirector
device. An attacker inside the guest could possibly use this issue to
cause QEMU to consume resources, resulting in a denial of service.
(CVE-2021-3527)
It was discovered that QEMU incorrectly handled the virtio vhost-user GPU
device. An attacker inside the guest could possibly use this issue to cause
QEMU to consume resources, leading to a denial of service. This issue only
affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-3544)
It was discovered that QEMU incorrectly handled the virtio vhost-user GPU
device. An attacker inside the guest could possibly use this issue to
obtain sensitive host information. This issue only affected Ubuntu 20.04
LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-3545)
It was discovered that QEMU incorrectly handled the virtio vhost-user GPU
device. An attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service, or possibly execute arbitrary
code. In the default installation, when QEMU is used in combination with
libvirt, attackers would be isolated by the libvirt AppArmor profile. This
issue only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04.
(CVE-2021-3546)
It was discovered that QEMU incorrectly handled the PVRDMA device. An
attacker inside the guest could use this issue to cause QEMU to crash,
resulting in a denial of service, or possibly execute arbitrary code. In
the default installation, when QEMU is used in combination with libvirt,
attackers would be isolated by the libvirt AppArmor profile. This issue
only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04.
(CVE-2021-3582, CVE-2021-3607, CVE-2021-3608)
It was discovered that QEMU SLiRP networking incorrectly handled certain
udp packets. An attacker inside a guest could possibly use this issue to
leak sensitive information from the host. (CVE-2021-3592, CVE-2021-3593,
CVE-2021-3594, CVE-2021-3595)
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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-2021-3594)\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 - 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. 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{'reference':'nbdkit-ssh-plugin-1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'nbdkit-ssh-plugin-1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'nbdkit-vddk-plugin-1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'nbdkit-xz-filter-1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'nbdkit-xz-filter-1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-devel-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-devel-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-libs-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'netcf-libs-0.2.8-12.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'perl-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'perl-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'perl-Sys-Guestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'perl-Sys-Guestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'perl-Sys-Virt-4.5.0-5.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'perl-Sys-Virt-4.5.0-5.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-libguestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'python3-libguestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'python3-libnbd-1.2.2-1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-libnbd-1.2.2-1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-libvirt-5.7.0-31.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'python3-libvirt-5.7.0-31.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'qemu-guest-agent-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-guest-agent-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-img-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-img-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-curl-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-curl-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-gluster-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-gluster-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-iscsi-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-iscsi-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-rbd-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-rbd-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-ssh-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-block-ssh-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-common-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-common-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-core-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'qemu-kvm-core-4.2.1-11.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'15'},\n {'reference':'ruby-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'ruby-hivex-1.3.18-20.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'ruby-libguestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'ruby-libguestfs-1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'seabios-1.13.0-2.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'seabios-bin-1.13.0-2.module+el8.4.0+20319+6eb4347c', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'seavgabios-bin-1.13.0-2.module+el8.4.0+20319+6eb4347c', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'sgabios-0.20170427git-3.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'sgabios-bin-0.20170427git-3.module+el8.4.0+20319+6eb4347c', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},\n {'reference':'supermin-5.1.19-10.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'supermin-5.1.19-10.module+el8.4.0+20319+6eb4347c', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'supermin-devel-5.1.19-10.module+el8.4.0+20319+6eb4347c', 'cpu':'aarch64', 'release':'8', 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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. 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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. (CVE-2021-3713)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. 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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\n 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\n 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\n 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\n 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\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 - 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. 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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. 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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. (CVE-2021-3713)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security\nadvisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional\nissues.\");\n # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2022-1034\n script_set_attribute(attribute:\"see_also\", value:\"http://www.nessus.org/u?47e746c0\");\n script_set_attribute(attribute:\"solution\", value:\n\"Update the affected qemu packages.\");\n script_set_cvss_base_vector(\"CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C\");\n script_set_cvss_temporal_vector(\"CVSS2#E:POC/RL:OF/RC:C\");\n script_set_cvss3_base_vector(\"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H\");\n script_set_cvss3_temporal_vector(\"CVSS:3.0/E:P/RL:O/RC:C\");\n script_set_attribute(attribute:\"cvss_score_source\", value:\"CVE-2021-3748\");\n script_set_attribute(attribute:\"cvss3_score_source\", value:\"CVE-2021-3682\");\n\n script_set_attribute(attribute:\"exploitability_ease\", value:\"Exploits are available\");\n script_set_attribute(attribute:\"exploit_available\", value:\"true\");\n\n script_set_attribute(attribute:\"vuln_publication_date\", value:\"2020/06/02\");\n script_set_attribute(attribute:\"patch_publication_date\", value:\"2022/01/28\");\n script_set_attribute(attribute:\"plugin_publication_date\", value:\"2022/01/28\");\n\n script_set_attribute(attribute:\"plugin_type\", value:\"local\");\n script_set_attribute(attribute:\"cpe\", value:\"p-cpe:/a:huawei:euleros:qemu-img\");\n script_set_attribute(attribute:\"cpe\", value:\"cpe:/o:huawei:euleros:2.0\");\n script_set_attribute(attribute:\"stig_severity\", value:\"II\");\n script_end_attributes();\n\n script_category(ACT_GATHER_INFO);\n script_family(english:\"Huawei Local Security Checks\");\n\n script_copyright(english:\"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.\");\n\n script_dependencies(\"ssh_get_info.nasl\");\n script_require_keys(\"Host/local_checks_enabled\", \"Host/cpu\", \"Host/EulerOS/release\", \"Host/EulerOS/rpm-list\", \"Host/EulerOS/sp\");\n script_exclude_keys(\"Host/EulerOS/uvp_version\");\n\n exit(0);\n}\n\ninclude(\"audit.inc\");\ninclude(\"global_settings.inc\");\ninclude(\"rpm.inc\");\n\nif (!get_kb_item(\"Host/local_checks_enabled\")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);\n\nvar release = get_kb_item(\"Host/EulerOS/release\");\nif (isnull(release) || release !~ \"^EulerOS\") audit(AUDIT_OS_NOT, \"EulerOS\");\nvar uvp = get_kb_item(\"Host/EulerOS/uvp_version\");\nif (release !~ \"^EulerOS release 2\\.0(\\D|$)\") audit(AUDIT_OS_NOT, \"EulerOS 2.0 SP9\");\n\nvar sp = get_kb_item(\"Host/EulerOS/sp\");\nif (isnull(sp) || sp !~ \"^(9)$\") audit(AUDIT_OS_NOT, \"EulerOS 2.0 SP9\");\n\nif (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, \"EulerOS 2.0 SP9\", \"EulerOS UVP \" + uvp);\n\nif (!get_kb_item(\"Host/EulerOS/rpm-list\")) audit(AUDIT_PACKAGE_LIST_MISSING);\n\nvar cpu = get_kb_item(\"Host/cpu\");\nif (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);\nif (\"x86_64\" >!< cpu && cpu !~ \"^i[3-6]86$\" && \"aarch64\" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, \"EulerOS\", cpu);\nif (\"x86_64\" >!< cpu && cpu !~ \"^i[3-6]86$\") audit(AUDIT_ARCH_NOT, \"i686 / x86_64\", cpu);\n\nvar flag = 0;\n\nvar pkgs = [\n \"qemu-img-4.1.0-16.h10.eulerosv2r9\"\n];\n\nforeach (var pkg in pkgs)\n if (rpm_check(release:\"EulerOS-2.0\", sp:\"9\", reference:pkg)) flag++;\n\nif (flag)\n{\n security_report_v4(\n port : 0,\n severity : SECURITY_WARNING,\n extra : rpm_report_get()\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\");\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-07-14T14:26:53", "description": "The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2461-1 advisory.\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. 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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_NOTE,\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": "2023-11-18T15:18:53", "description": "According to the versions of the qemu package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :\n\n - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL dereference) when the command header 'ad->cur_cmd' is null. (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. (CVE-2021-3713)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.", "cvss3": {}, "published": "2022-01-28T00:00:00", "type": "nessus", "title": "EulerOS 2.0 SP9 : qemu (EulerOS-SA-2022-1014)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2019-12067", "CVE-2020-13754", "CVE-2020-25085", "CVE-2020-25742", "CVE-2020-25743", "CVE-2020-27617", "CVE-2020-27821", "CVE-2020-29129", "CVE-2020-29443", "CVE-2020-35504", "CVE-2020-35505", "CVE-2021-20181", "CVE-2021-20203", "CVE-2021-20221", "CVE-2021-3392", "CVE-2021-3416", "CVE-2021-3527", "CVE-2021-3544", "CVE-2021-3545", "CVE-2021-3546", "CVE-2021-3592", "CVE-2021-3593", "CVE-2021-3595", "CVE-2021-3682", "CVE-2021-3713", "CVE-2021-3748"], "modified": "2023-11-17T00:00:00", "cpe": ["p-cpe:/a:huawei:euleros:qemu-img", "cpe:/o:huawei:euleros:2.0"], "id": "EULEROS_SA-2022-1014.NASL", "href": "https://www.tenable.com/plugins/nessus/157171", "sourceData": "#%NASL_MIN_LEVEL 70300\n##\n# (C) Tenable Network Security, Inc.\n##\n\ninclude('deprecated_nasl_level.inc');\ninclude('compat.inc');\n\nif (description)\n{\n script_id(157171);\n script_version(\"1.6\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2023/11/17\");\n\n script_cve_id(\n \"CVE-2019-12067\",\n \"CVE-2020-13754\",\n \"CVE-2020-25085\",\n \"CVE-2020-25742\",\n \"CVE-2020-25743\",\n \"CVE-2020-27617\",\n \"CVE-2020-27821\",\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-2021-3527\",\n \"CVE-2021-3544\",\n \"CVE-2021-3545\",\n \"CVE-2021-3546\",\n \"CVE-2021-3592\",\n \"CVE-2021-3593\",\n \"CVE-2021-3595\",\n \"CVE-2021-3682\",\n \"CVE-2021-3713\",\n \"CVE-2021-3748\",\n \"CVE-2021-20181\",\n \"CVE-2021-20203\",\n \"CVE-2021-20221\"\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-0075-S\");\n\n script_name(english:\"EulerOS 2.0 SP9 : qemu (EulerOS-SA-2022-1014)\");\n\n script_set_attribute(attribute:\"synopsis\", value:\n\"The remote EulerOS host is missing multiple security updates.\");\n script_set_attribute(attribute:\"description\", value:\n\"According to the versions of the qemu package installed, the EulerOS installation on the remote host is affected by the\nfollowing vulnerabilities :\n\n - The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL\n dereference) when the command header 'ad->cur_cmd' is null. (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\n 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\n 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\n 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\n 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\n can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. 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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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QEMU vulnerabilities
