ID CVE-2016-6259 Type cve Reporter cve@mitre.org Modified 2016-08-04T03:15:00
Description
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
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CVE-2016-4439: The esp_reg_write function in the 53C9X\n Fast SCSI Controller (FSC) support did not properly\n check command buffer length, which allowed local guest\n OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) or\n potentially execute arbitrary code on the host via\n unspecified vectors (bsc#980716).\n\n - CVE-2016-3710: The VGA module improperly performed\n bounds checking on banked access to video memory, which\n allowed local guest OS administrators to execute\n arbitrary code on the host by changing access modes\n after setting the bank register, aka the ", "modified": "2019-11-02T00:00:00", "id": "SUSE_SU-2016-2093-1.NASL", "href": "https://www.tenable.com/plugins/nessus/93296", "published": "2016-09-02T00:00:00", "title": "SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster)", "type": "nessus", "sourceData": "#\n# (C) Tenable Network Security, Inc.\n#\n# The descriptive text and package checks in this plugin were\n# extracted from SUSE update advisory SUSE-SU-2016:2093-1.\n# The text itself is copyright (C) SUSE.\n#\n\ninclude(\"compat.inc\");\n\nif (description)\n{\n script_id(93296);\n script_version(\"2.14\");\n script_cvs_date(\"Date: 2019/09/11 11:22:13\");\n\n script_cve_id(\"CVE-2014-3672\", \"CVE-2016-3158\", \"CVE-2016-3159\", \"CVE-2016-3710\", \"CVE-2016-3960\", \"CVE-2016-4001\", \"CVE-2016-4002\", \"CVE-2016-4020\", \"CVE-2016-4037\", \"CVE-2016-4439\", \"CVE-2016-4441\", \"CVE-2016-4453\", \"CVE-2016-4454\", \"CVE-2016-4952\", \"CVE-2016-4962\", \"CVE-2016-4963\", \"CVE-2016-5105\", \"CVE-2016-5106\", \"CVE-2016-5107\", \"CVE-2016-5126\", \"CVE-2016-5238\", \"CVE-2016-5337\", \"CVE-2016-5338\", \"CVE-2016-5403\", \"CVE-2016-6258\", \"CVE-2016-6259\", \"CVE-2016-6351\");\n script_xref(name:\"IAVB\", value:\"2016-B-0118\");\n\n script_name(english:\"SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster)\");\n script_summary(english:\"Checks rpm output for the updated packages.\");\n\n script_set_attribute(\n attribute:\"synopsis\", \n value:\"The remote SUSE host is missing one or more security updates.\"\n );\n script_set_attribute(\n attribute:\"description\", \n value:\n\"This update for xen to version 4.5.3 fixes the several issues. 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CVE-2016-4439: The esp_reg_write function in the 53C9X\n Fast SCSI Controller (FSC) support did not properly\n check command buffer length, which allowed local guest\n OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) or\n potentially execute arbitrary code on the host via\n unspecified vectors (bsc#980716).\n\n - CVE-2016-3710: The VGA module improperly performed\n bounds checking on banked access to video memory, which\n allowed local guest OS administrators to execute\n arbitrary code on the host by changing access modes\n after setting the bank register, aka the 'Dark Portal'\n issue (bsc#978164).\n\n - CVE-2016-3960: Integer overflow in the x86 shadow\n pagetable code allowed local guest OS users to cause a\n denial of service (host crash) or possibly gain\n privileges by shadowing a superpage mapping\n (bsc#974038).\n\n - CVE-2016-3159: The fpu_fxrstor function in\n arch/x86/i387.c did not properly handle writes to the\n hardware FSW.ES bit when running on AMD64 processors,\n which allowed local guest OS users to obtain sensitive\n register content information from another guest by\n leveraging pending exception and mask bits (bsc#973188).\n\n - CVE-2016-3158: The xrstor function did not properly\n handle writes to the hardware FSW.ES bit when running on\n AMD64 processors, which allowed local guest OS users to\n obtain sensitive register content information from\n another guest by leveraging pending exception and mask\n bits (bsc#973188).\n\n - CVE-2016-4037: The ehci_advance_state function in\n hw/usb/hcd-ehci.c allowed local guest OS administrators\n to cause a denial of service (infinite loop and CPU\n consumption) via a circular split isochronous transfer\n descriptor (siTD) list (bsc#976111).\n\n - CVE-2016-4020: The patch_instruction function did not\n initialize the imm32 variable, which allowed local guest\n OS administrators to obtain sensitive information from\n host stack memory by accessing the Task Priority\n Register (TPR) (bsc#975907).\n\n - CVE-2016-4001: Buffer overflow in the\n stellaris_enet_receive function, when the Stellaris\n ethernet controller is configured to accept large\n packets, allowed remote attackers to cause a denial of\n service (QEMU crash) via a large packet (bsc#975130).\n\n - CVE-2016-4002: Buffer overflow in the mipsnet_receive\n function, when the guest NIC is configured to accept\n large packets, allowed remote attackers to cause a\n denial of service (memory corruption and QEMU crash) or\n possibly execute arbitrary code via a packet larger than\n 1514 bytes (bsc#975138).\n\n - bsc#978295: x86 software guest page walk PS bit handling\n flaw (XSA-176)\n\n - CVE-2016-5403: virtio: unbounded memory allocation on\n host via guest leading to DoS (XSA-184) (bsc#990923)\n\n - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma\n (bsc#990843)\n\nThe update package also includes non-security fixes. 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content information from\n another guest by leveraging pending exception and mask\n bits (bsc#973188)\n\n - CVE-2016-3159: The fpu_fxrstor function in\n arch/x86/i387.c did not properly handle writes to the\n hardware FSW.ES bit when running on AMD64 processors,\n which allowed local guest OS users to obtain sensitive\n register content information from another guest by\n leveraging pending exception and mask bits (bsc#973188)\n\n - CVE-2016-4037: The ehci_advance_state function in\n hw/usb/hcd-ehci.c allowed local guest OS administrators\n to cause a denial of service (infinite loop and CPU\n consumption) via a circular split isochronous transfer\n descriptor (siTD) list (bsc#976111)\n\n - CVE-2016-4020: The patch_instruction function did not\n initialize the imm32 variable, which allowed local guest\n OS administrators to obtain sensitive information from\n host stack memory by accessing the Task Priority\n Register (TPR) (bsc#975907)\n\n - CVE-2016-4001: Buffer overflow in the\n stellaris_enet_receive function, when the Stellaris\n ethernet controller is configured to accept large\n packets, allowed remote attackers to cause a denial of\n service (QEMU crash) via a large packet (bsc#975130)\n\n - CVE-2016-4002: Buffer overflow in the mipsnet_receive\n function, when the guest NIC is configured to accept\n large packets, allowed remote attackers to cause a\n denial of service (memory corruption and QEMU crash) or\n possibly execute arbitrary code via a packet larger than\n 1514 bytes (bsc#975138)\n\n - CVE-2016-4480: The guest_walk_tables function in\n arch/x86/mm/guest_walk.c in Xen did not properly handle\n the Page Size (PS) page table entry bit at the L4 and L3\n page table levels, which might have allowed local guest\n OS users to gain privileges via a crafted mapping of\n memory (bsc#978295)\n\nThese non-security issues were fixed :\n\n - boo#991934: xen hypervisor crash in csched_acct\n\n - boo#992224: During boot of Xen Hypervisor, Failed to get\n contiguous memory for DMA from Xen\n\n - boo#955104: Virsh reports error 'one or more references\n were leaked after disconnect from hypervisor' when\n 'virsh save' failed due to 'no response from client\n after 6 keepalive messages'\n\n - boo#959552: Migration of HVM guest leads into libvirt\n segmentation fault\n\n - boo#993665: Migration of xen guests finishes in: One or\n more references were leaked after disconnect from the\n hypervisor\n\n - boo#959330: Guest migrations using virsh results in\n error 'Internal error: received hangup / error event on\n socket'\n\n - boo#990500: VM virsh migration fails with keepalive\n error: ':virKeepAliveTimerInternal:143 : No response\n from client'\n\n - boo#953518: Unplug also SCSI disks in\n qemu-xen-traditional for upstream unplug protocol\n\n - boo#953518: xen_platform: unplug also SCSI disks in\n qemu-xen\n\n - boo#971949: Support (by ignoring) xl migrate --live. xl\n migrations are always live \n\n - boo#970135: New virtualization 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However, legitimate accesses into userspace require whitelisting, and the exception delivery mechanism for 32bit PV guests wasn't whitelisted.\n#### IMPACT\nA malicious 32-bit PV guest kernel can trigger a safety check, crashing the hypervisor and causing a denial of service to other VMs on the host.\n#### VULNERABLE SYSTEMS\nXen version 4.5 and newer are vulnerable. Versions 4.4 and older are not, due to not having software support for SMAP.\nThe vulnerability is only exposed on x86 hardware supporting the SMAP feature (Intel Broadwell and later CPUs). The vulnerability is not exposed on ARM hardware, or x86 hardware which do not support SMAP.\nThe vulnerability is only exposed to x86 32bit PV guests. The vulnerability is not exposed to 64bit PV guests or HVM guests.\n", "modified": "2016-07-26T11:32:00", "published": "2016-07-26T11:32:00", "id": "XSA-183", "href": "http://xenbits.xen.org/xsa/advisory-183.html", "title": "x86: Missing SMAP whitelisting in 32-bit exception / event delivery", "type": "xen", "cvss": {"score": 4.9, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:NONE/I:NONE/A:COMPLETE/"}}], "freebsd": [{"lastseen": "2019-05-29T18:32:37", "bulletinFamily": "unix", "description": "\nThe Xen Project reports:\n\nSupervisor Mode Access Prevention is a hardware feature designed\n\t to make an Operating System more robust, by raising a pagefault\n\t rather than accidentally following a pointer into userspace.\n\t However, legitimate accesses into userspace require whitelisting,\n\t and the exception delivery mechanism for 32bit PV guests wasn't\n\t whitelisted.\nA malicious 32-bit PV guest kernel can trigger a safety check,\n\t crashing the hypervisor and causing a denial of service to other\n\t VMs on the host.\n\n", "modified": "2016-07-26T00:00:00", "published": "2016-07-26T00:00:00", "id": "04CF89E3-5854-11E6-B334-002590263BF5", "href": "https://vuxml.freebsd.org/freebsd/04cf89e3-5854-11e6-b334-002590263bf5.html", "title": "xen-kernel -- x86: Missing SMAP whitelisting in 32-bit exception / event delivery", "type": "freebsd", "cvss": {"score": 4.9, "vector": "AV:L/AC:L/Au:N/C:N/I:N/A:C"}}], "openvas": [{"lastseen": "2019-05-29T18:35:22", "bulletinFamily": "scanner", "description": "A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of a PV guest VM to compromise or crash the host.", "modified": "2018-11-13T00:00:00", "published": "2016-07-28T00:00:00", "id": "OPENVAS:1361412562310105833", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310105833", "title": "Citrix XenServer Multiple Security Updates (CTX214954)", "type": "openvas", "sourceData": "###############################################################################\n# OpenVAS Vulnerability Test\n# $Id: gb_xenserver_ctx214954.nasl 3771 2016-07-28 16:13:46Z mime $\n#\n# Citrix XenServer Multiple Security Updates (CTX214954)\n#\n# Authors:\n# Michael Meyer <michael.meyer@greenbone.net>\n#\n# Copyright:\n# Copyright (c) 2016 Greenbone Networks GmbH\n#\n# This program is free software; you can redistribute it and/or\n# modify it under the terms of the GNU General Public License\n# as published by the Free Software Foundation; either version 2\n# of the License, or (at your option) any later version.\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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A privileged user inside guest could have used this to leak\n host memory bytes to a guest (boo#994761)\n\n - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3\n device driver. A privileged user inside guest could have used this flaw\n to crash the Qemu instance resulting in DoS (bsc#994772)\n\n - CVE-2016-6833: Use-after-free issue in the VMWARE VMXNET3 NIC device\n support. A privileged user inside guest could have used this issue to\n crash the Qemu instance resulting in DoS (boo#994775)\n\n - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support,\n causing an OOB read access (bsc#994625)\n\n - CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE\n VMXNET3 NIC device support allowed privileged user inside guest to crash\n the Qemu instance resulting in DoS (bsc#994421)\n\n - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed\n local 32-bit PV guest OS administrators to gain host OS privileges by\n leveraging fast-paths for updating pagetable entries (bsc#988675)\n\n - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention\n (SMAP) whitelisting in 32-bit exception and event delivery, which\n allowed local 32-bit PV guest OS kernels to cause a denial of service\n (hypervisor and VM crash) by triggering a safety check (bsc#988676)\n\n - CVE-2016-5403: The virtqueue_pop function in hw/virtio/virtio.c in QEMU\n allowed local guest OS administrators to cause a denial of service\n (memory consumption and QEMU process crash) by submitting requests\n without waiting for completion (boo#990923)\n\n - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with\n ESP/NCR53C9x controller emulation support, allowed local guest OS\n administrators to cause a denial of service (out-of-bounds write and\n QEMU process c ...\n\n Description truncated, please see the referenced URL(s) for more information.\");\n script_tag(name:\"affected\", value:\"xen on openSUSE Leap 42.1\");\n script_tag(name:\"solution\", value:\"Please install the updated packages.\");\n\n script_xref(name:\"openSUSE-SU\", value:\"2016:2494_1\");\n script_tag(name:\"solution_type\", value:\"VendorFix\");\n script_category(ACT_GATHER_INFO);\n script_copyright(\"Copyright (C) 2016 Greenbone Networks GmbH\");\n script_family(\"SuSE Local Security Checks\");\n script_dependencies(\"gather-package-list.nasl\");\n script_mandatory_keys(\"ssh/login/suse\", \"ssh/login/rpms\", re:\"ssh/login/release=openSUSELeap42\\.1\");\n exit(0);\n}\n\ninclude(\"revisions-lib.inc\");\ninclude(\"pkg-lib-rpm.inc\");\n\nrelease = rpm_get_ssh_release();\nif(!release) exit(0);\nres = \"\";\n\nif(release == \"openSUSELeap42.1\")\n{\n\n if ((res = isrpmvuln(pkg:\"xen-debugsource\", rpm:\"xen-debugsource~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-devel\", rpm:\"xen-devel~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-libs\", rpm:\"xen-libs~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-libs-debuginfo\", rpm:\"xen-libs-debuginfo~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-tools-domU\", rpm:\"xen-tools-domU~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-tools-domU-debuginfo\", rpm:\"xen-tools-domU-debuginfo~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen\", rpm:\"xen~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-doc-html\", rpm:\"xen-doc-html~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-kmp-default\", rpm:\"xen-kmp-default~4.5.3_10_k4.1.31_30~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-kmp-default-debuginfo\", rpm:\"xen-kmp-default-debuginfo~4.5.3_10_k4.1.31_30~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-libs-32bit\", rpm:\"xen-libs-32bit~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-libs-debuginfo-32bit\", rpm:\"xen-libs-debuginfo-32bit~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-tools\", rpm:\"xen-tools~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if ((res = isrpmvuln(pkg:\"xen-tools-debuginfo\", rpm:\"xen-tools-debuginfo~4.5.3_10~15.2\", rls:\"openSUSELeap42.1\")) != NULL)\n {\n security_message(data:res);\n exit(0);\n }\n\n if (__pkg_match) exit(99);\n exit(0);\n}\n", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}], "suse": [{"lastseen": "2016-10-07T13:27:36", "bulletinFamily": "unix", "description": "This update for xen fixes several issues.\n\n These security issues were fixed:\n - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen\n allowed local 32-bit PV guest OS administrators to gain host OS\n privileges via vectors related to L3 recursive pagetables (bsc#995785).\n - CVE-2016-7093: Xen allowed local HVM guest OS administrators to\n overwrite hypervisor memory and consequently gain host OS privileges by\n leveraging mishandling of instruction pointer truncation during\n emulation (bsc#995789).\n - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS\n administrators on guests running with shadow paging to cause a denial of\n service via a pagetable update (bsc#995792).\n - CVE-2016-6836: Information leakage in vmxnet3_complete_packet\n (bsc#994761).\n - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3\n device driver. Aprivileged user inside guest c... (bsc#994772).\n - CVE-2016-6833: Use after free while writing (bsc#994775).\n - CVE-2016-6835: Buffer overflow in vmxnet_tx_pkt_parse_headers() in\n vmxnet3 deviceemulation. (bsc#994625).\n - CVE-2016-6834: An infinite loop during packet fragmentation (bsc#994421).\n - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed\n local 32-bit PV guest OS administrators to gain host OS privileges by\n leveraging fast-paths for updating pagetable entries (bsc#988675).\n - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention\n (SMAP) whitelisting in 32-bit exception and event delivery, which\n allowed local 32-bit PV guest OS kernels to cause a denial of service\n (hypervisor and VM crash) by triggering a safety check (bsc#988676).\n\n These non-security issues were fixed:\n - bsc#991934: Hypervisor crash in csched_acct\n - bsc#992224: During boot of Xen Hypervisor, failed to get contiguous\n memory for DMA\n - bsc#955104: Virsh reports error "one or more references were leaked\n after disconnect from hypervisor" when "virsh save" failed due to "no\n response from client after 6 keepalive messages"\n - bsc#959552: Migration of HVM guest leads into libvirt segmentation fault\n - bsc#993665: Migration of xen guests finishes in: One or more references\n were leaked after disconnect from the hypervisor\n - bsc#959330: Guest migrations using virsh results in error "Internal\n error: received hangup / error event on socket"\n - bsc#990500: VM virsh migration fails with keepalive error:\n ":virKeepAliveTimerInternal:143 : No response from client"\n - bsc#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream\n unplug protocol\n - bsc#953518: xen_platform: unplug also SCSI disks in qemu-xen\n - bsc#971949: xl: Support (by ignoring) xl migrate --live. xl migrations\n are always live\n - bsc#970135: New virtualization project clock test randomly fails on Xen\n - bsc#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79)\n\n", "modified": "2016-10-07T14:09:00", "published": "2016-10-07T14:09:00", "id": "SUSE-SU-2016:2473-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00014.html", "type": "suse", "title": "Security update for xen (important)", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}, {"lastseen": "2016-09-04T12:29:07", "bulletinFamily": "unix", "description": "This update for xen to version 4.5.3 fixes the several issues.\n\n These security issues were fixed:\n\n - CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182)\n (bsc#988675).\n - CVE-2016-6259: Missing SMAP whitelisting in 32-bit exception / event\n delivery (XSA-183) (bsc#988676).\n - CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS\n administrators to obtain sensitive host memory information via vectors\n related to reading device control information (bsc#983973).\n - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions\n allowed local guest OS administrators to cause a denial of service (QEMU\n process crash) or execute arbitrary code on the host via vectors related\n to the information transfer buffer (bsc#983984).\n - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed\n local guest OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) via vectors related to\n reading from the information transfer buffer in non-DMA mode\n (bsc#982960).\n - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS\n administrators to cause a denial of service (infinite loop and QEMU\n process crash) via a VGA command (bsc#982225).\n - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS\n administrators to obtain sensitive host memory information or cause a\n denial of service (QEMU process crash) by changing FIFO registers and\n issuing a VGA command, which triggered an out-of-bounds read\n (bsc#982224).\n - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl\n function allowed local guest OS users to cause a denial of service (QEMU\n process crash) or possibly execute arbitrary code via a crafted iSCSI\n asynchronous I/O ioctl call (bsc#982286).\n - CVE-2016-5105: Stack information leakage while reading configuration\n (bsc#982024).\n - CVE-2016-5106: Out-of-bounds write while setting controller properties\n (bsc#982025).\n - CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function\n (bsc#982026).\n - CVE-2016-4963: The libxl device-handling allowed local guest OS users\n with access to the driver domain to cause a denial of service\n (management tool confusion) by manipulating information in the backend\n directories in xenstore (bsc#979670).\n - CVE-2016-4962: The libxl device-handling allowed local OS guest\n administrators to cause a denial of service (resource consumption or\n management facility confusion) or gain host OS privileges by\n manipulating information in guest controlled areas of xenstore\n (bsc#979620).\n - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data\n routines (bsc#981276).\n - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local\n guest OS users to cause a denial of service (host disk consumption) by\n writing to stdout or stderr (bsc#981264).\n - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller\n (FSC) support did not properly check DMA length, which allowed local\n guest OS administrators to cause a denial of service (out-of-bounds\n write and QEMU process crash) via unspecified vectors, involving an SCSI\n command (bsc#980724).\n - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI\n Controller (FSC) support did not properly check command buffer length,\n which allowed local guest OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) or potentially execute\n arbitrary code on the host via unspecified vectors (bsc#980716).\n - CVE-2016-3710: The VGA module improperly performed bounds checking on\n banked access to video memory, which allowed local guest OS\n administrators to execute arbitrary code on the host by changing access\n modes after setting the bank register, aka the "Dark Portal" issue\n (bsc#978164).\n - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed\n local guest OS users to cause a denial of service (host crash) or\n possibly gain privileges by shadowing a superpage mapping (bsc#974038).\n - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not\n properly handle writes to the hardware FSW.ES bit when running on AMD64\n processors, which allowed local guest OS users to obtain sensitive\n register content information from another guest by leveraging pending\n exception and mask bits (bsc#973188).\n - CVE-2016-3158: The xrstor function did not properly handle writes to the\n hardware FSW.ES bit when running on AMD64 processors, which allowed\n local guest OS users to obtain sensitive register content information\n from another guest by leveraging pending exception and mask bits\n (bsc#973188).\n - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c\n allowed local guest OS administrators to cause a denial of service\n (infinite loop and CPU consumption) via a circular split isochronous\n transfer descriptor (siTD) list (bsc#976111).\n - CVE-2016-4020: The patch_instruction function did not initialize the\n imm32 variable, which allowed local guest OS administrators to obtain\n sensitive information from host stack memory by accessing the Task\n Priority Register (TPR) (bsc#975907).\n - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function,\n when the Stellaris ethernet controller is configured to accept large\n packets, allowed remote attackers to cause a denial of service (QEMU\n crash) via a large packet (bsc#975130).\n - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the\n guest NIC is configured to accept large packets, allowed remote\n attackers to cause a denial of service (memory corruption and QEMU\n crash) or possibly execute arbitrary code via a packet larger than 1514\n bytes (bsc#975138).\n - bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176)\n - CVE-2016-5403: virtio: unbounded memory allocation on host via guest\n leading to DoS (XSA-184) (bsc#990923)\n - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843)\n\n These non-security issues were fixed:\n\n - bsc#986586: Out of memory (oom) during boot on "modprobe xenblk" (non\n xen kernel)\n - bsc#900418: Dump cannot be performed on SLES12 XEN\n - bsc#953339: Implement SUSE specific unplug protocol for emulated PCI\n devices in PVonHVM guests to qemu-xen-upstream\n - bsc#953362: Implement SUSE specific unplug protocol for emulated PCI\n devices in PVonHVM guests to qemu-xen-upstream\n - bsc#953518: Implement SUSE specific unplug protocol for emulated PCI\n devices in PVonHVM guests to qemu-xen-upstream\n - bsc#984981: Implement SUSE specific unplug protocol for emulated PCI\n devices in PVonHVM guests to qemu-xen-upstream\n - bsc#954872: Script block-dmmd not working as expected - libxl: error:\n libxl_dm.c (Additional fixes)\n - bsc#982695: qemu fails to boot HVM guest from xvda\n - bsc#958848: HVM guest crash at\n /usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/balloon/balloon.c:407\n\n - bsc#949889: Fail to install 32-bit paravirt VM under SLES12SP1Beta3 XEN\n - bsc#954872: Script block-dmmd not working as expected - libxl: error:\n libxl_dm.c (another modification)\n - bsc#961600: Poor performance when Xen HVM domU configured with max\n memory greater than current memory\n - bsc#963161: Windows VM getting stuck during load while a VF is assigned\n to it after upgrading to latest maintenance updates\n - bsc#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)\n - bsc#973631: AWS EC2 kdump issue\n - bsc#957986: Indirect descriptors are not compatible with Amazon block\n backend\n - bsc#964427: Discarding device blocks: failed - Input/output error\n - bsc#985503: Fixed vif-route\n - bsc#978413: PV guest upgrade from SLES11 SP4 to SLES 12 SP2 alpha3 failed\n\n", "modified": "2016-08-17T18:08:50", "published": "2016-08-17T18:08:50", "id": "SUSE-SU-2016:2093-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00041.html", "type": "suse", "title": "Security update for xen (important)", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}, {"lastseen": "2016-10-11T17:26:45", "bulletinFamily": "unix", "description": "This update for xen fixes the following issues:\n\n These security issues were fixed:\n - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen\n allowed local 32-bit PV guest OS administrators to gain host OS\n privileges via vectors related to L3 recursive pagetables (bsc#995785)\n - CVE-2016-7093: Xen allowed local HVM guest OS administrators to\n overwrite hypervisor memory and consequently gain host OS privileges by\n leveraging mishandling of instruction pointer truncation during\n emulation (bsc#995789)\n - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS\n administrators on guests running with shadow paging to cause a denial of\n service via a pagetable update (bsc#995792)\n - CVE-2016-6836: VMWARE VMXNET3 NIC device support was leaging information\n leakage. A privileged user inside guest could have used this to leak\n host memory bytes to a guest (boo#994761)\n - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3\n device driver. A privileged user inside guest could have used this flaw\n to crash the Qemu instance resulting in DoS (bsc#994772)\n - CVE-2016-6833: Use-after-free issue in the VMWARE VMXNET3 NIC device\n support. A privileged user inside guest could have used this issue to\n crash the Qemu instance resulting in DoS (boo#994775)\n - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support,\n causing an OOB read access (bsc#994625)\n - CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE\n VMXNET3 NIC device support allowed privileged user inside guest to crash\n the Qemu instance resulting in DoS (bsc#994421)\n - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed\n local 32-bit PV guest OS administrators to gain host OS privileges by\n leveraging fast-paths for updating pagetable entries (bsc#988675)\n - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention\n (SMAP) whitelisting in 32-bit exception and event delivery, which\n allowed local 32-bit PV guest OS kernels to cause a denial of service\n (hypervisor and VM crash) by triggering a safety check (bsc#988676)\n - CVE-2016-5403: The virtqueue_pop function in hw/virtio/virtio.c in QEMU\n allowed local guest OS administrators to cause a denial of service\n (memory consumption and QEMU process crash) by submitting requests\n without waiting for completion (boo#990923)\n - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with\n ESP/NCR53C9x controller emulation support, allowed local guest OS\n administrators to cause a denial of service (out-of-bounds write and\n QEMU process crash) or execute arbitrary code on the host via vectors\n involving DMA read into ESP command buffer (bsc#990843)\n - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed\n local 32-bit PV guest OS administrators to gain host OS privileges by\n leveraging fast-paths for updating pagetable entries (bsc#988675)\n - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention\n (SMAP) whitelisting in 32-bit exception and event delivery, which\n allowed local 32-bit PV guest OS kernels to cause a denial of service\n (hypervisor and VM crash) by triggering a safety check (bsc#988676)\n - CVE-2016-5337: The megasas_ctrl_get_info function in hw/scsi/megasas.c\n in QEMU allowed local guest OS administrators to obtain sensitive host\n memory information via vectors related to reading device control\n information (bsc#983973)\n - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions in\n hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a\n denial of service (QEMU process crash) or execute arbitrary code on the\n QEMU host via vectors related to the information transfer buffer\n (bsc#983984)\n - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in QEMU allowed\n local guest OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) via vectors related to\n reading from the information transfer buffer in non-DMA mode (bsc#982960)\n - CVE-2016-4453: The vmsvga_fifo_run function in hw/display/vmware_vga.c\n in QEMU allowed local guest OS administrators to cause a denial of\n service (infinite loop and QEMU process crash) via a VGA command\n (bsc#982225)\n - CVE-2016-4454: The vmsvga_fifo_read_raw function in\n hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to\n obtain sensitive host memory information or cause a denial of service\n (QEMU process crash) by changing FIFO registers and issuing a VGA\n command, which triggers an out-of-bounds read (bsc#982224)\n - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl\n function in block/iscsi.c in QEMU allowed local guest OS users to cause\n a denial of service (QEMU process crash) or possibly execute arbitrary\n code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286)\n - CVE-2016-5105: The megasas_dcmd_cfg_read function in hw/scsi/megasas.c\n in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation\n support, used an uninitialized variable, which allowed local guest\n administrators to read host memory via vectors involving a MegaRAID\n Firmware Interface (MFI) command (bsc#982024)\n - CVE-2016-5106: The megasas_dcmd_set_properties function in\n hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus\n Adapter emulation support, allowed local guest administrators to cause a\n denial of service (out-of-bounds write access) via vectors involving a\n MegaRAID Firmware Interface (MFI) command (bsc#982025)\n - CVE-2016-5107: The megasas_lookup_frame function in QEMU, when built\n with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed\n local guest OS administrators to cause a denial of service\n (out-of-bounds read and crash) via unspecified vectors (bsc#982026)\n - CVE-2016-4963: The libxl device-handling allowed local guest OS users\n with access to the driver domain to cause a denial of service\n (management tool confusion) by manipulating information in the backend\n directories in xenstore (bsc#979670)\n - CVE-2016-4962: The libxl device-handling allowed local OS guest\n administrators to cause a denial of service (resource consumption or\n management facility confusion) or gain host OS privileges by\n manipulating information in guest controlled areas of xenstore\n (bsc#979620)\n - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data\n routines (bsc#981276)\n - CVE-2016-3710: The VGA module improperly performed bounds checking on\n banked access to video memory, which allowed local guest OS\n administrators to execute arbitrary code on the host by changing access\n modes after setting the bank register, aka the "Dark Portal" issue\n (bsc#978164)\n - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local\n guest OS users to cause a denial of service (host disk consumption) by\n writing to stdout or stderr (bsc#981264)\n - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller\n (FSC) support did not properly check DMA length, which allowed local\n guest OS administrators to cause a denial of service (out-of-bounds\n write and QEMU process crash) via unspecified vectors, involving an SCSI\n command (bsc#980724)\n - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI\n Controller (FSC) support did not properly check command buffer length,\n which allowed local guest OS administrators to cause a denial of service\n (out-of-bounds write and QEMU process crash) or potentially execute\n arbitrary code on the host via unspecified vectors (bsc#980716)\n - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed\n local guest OS users to cause a denial of service (host crash) or\n possibly gain privileges by shadowing a superpage mapping (bsc#974038)\n - CVE-2016-3158: The xrstor function did not properly handle writes to the\n hardware FSW.ES bit when running on AMD64 processors, which allowed\n local guest OS users to obtain sensitive register content information\n from another guest by leveraging pending exception and mask bits\n (bsc#973188)\n - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not\n properly handle writes to the hardware FSW.ES bit when running on AMD64\n processors, which allowed local guest OS users to obtain sensitive\n register content information from another guest by leveraging pending\n exception and mask bits (bsc#973188)\n - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c\n allowed local guest OS administrators to cause a denial of service\n (infinite loop and CPU consumption) via a circular split isochronous\n transfer descriptor (siTD) list (bsc#976111)\n - CVE-2016-4020: The patch_instruction function did not initialize the\n imm32 variable, which allowed local guest OS administrators to obtain\n sensitive information from host stack memory by accessing the Task\n Priority Register (TPR) (bsc#975907)\n - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function,\n when the Stellaris ethernet controller is configured to accept large\n packets, allowed remote attackers to cause a denial of service (QEMU\n crash) via a large packet (bsc#975130)\n - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the\n guest NIC is configured to accept large packets, allowed remote\n attackers to cause a denial of service (memory corruption and QEMU\n crash) or possibly execute arbitrary code via a packet larger than 1514\n bytes (bsc#975138)\n - CVE-2016-4480: The guest_walk_tables function in\n arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size\n (PS) page table entry bit at the L4 and L3 page table levels, which\n might have allowed local guest OS users to gain privileges via a crafted\n mapping of memory (bsc#978295)\n\n These non-security issues were fixed:\n - boo#991934: xen hypervisor crash in csched_acct\n - boo#992224: During boot of Xen Hypervisor, Failed to get contiguous\n memory for DMA from Xen\n - boo#955104: Virsh reports error "one or more references were leaked\n after disconnect from hypervisor" when "virsh save" failed due to "no\n response from client after 6 keepalive messages"\n - boo#959552: Migration of HVM guest leads into libvirt segmentation fault\n - boo#993665: Migration of xen guests finishes in: One or more references\n were leaked after disconnect from the hypervisor\n - boo#959330: Guest migrations using virsh results in error "Internal\n error: received hangup / error event on socket"\n - boo#990500: VM virsh migration fails with keepalive error:\n ":virKeepAliveTimerInternal:143 : No response from client"\n - boo#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream\n unplug protocol\n - boo#953518: xen_platform: unplug also SCSI disks in qemu-xen\n - boo#971949: Support (by ignoring) xl migrate --live. xl migrations are\n always live\n - boo#970135: New virtualization project clock test randomly fails on Xen\n - boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79)\n - boo#985503: vif-route broken\n - boo#961100: Migrate a fv guest from sles12 to sles12sp1 fails remove\n patch because it can not fix the bug\n - boo#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed\n on sles11sp4 xen host.\n - boo#986586: Out of memory (oom) during boot on "modprobe xenblk" (non\n xen kernel) init.50-hvm-xen_conf\n - boo#900418: Dump cannot be performed on SLES12 XEN\n - boo#953339, boo#953362, boo#953518, boo#984981: Implement SUSE specific\n unplug protocol for emulated PCI devices in PVonHVM guests to\n qemu-xen-upstream\n - boo#954872: script block-dmmd not working as expected - libxl: error:\n libxl_dm.c (Additional fixes) block-dmmd\n - boo#982695: xen-4.5.2 qemu fails to boot HVM guest from xvda\n - boo#958848: HVM guest crash at /usr/src/packages/BUILD/\n xen-4.4.2-testing/obj/default/balloon/balloon.c:407\n - boo#949889: Fail to install 32-bit paravirt VM under SLES12SP1Beta3 XEN\n - boo#954872: script block-dmmd not working as expected - libxl: error:\n libxl_dm.c (another modification) block-dmmd\n - boo#961600: Poor performance when Xen HVM domU configured with max\n memory greater than current memory\n - boo#963161: Windows VM getting stuck during load while a VF is assigned\n to it after upgrading to latest maintenance updates\n - boo#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)\n - boo#961100: Migrate a fv guest from sles12 to sles12sp1 on xen fails for\n "Domain is not running on destination host".\n qemu-ignore-kvm-tpr-opt-on-migration.patch\n - boo#973631: AWS EC2 kdump issue\n - boo#964427: Discarding device blocks: failed - Input/output error\n\n", "modified": "2016-10-11T19:08:23", "published": "2016-10-11T19:08:23", "id": "OPENSUSE-SU-2016:2494-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00020.html", "type": "suse", "title": "Security update for xen (important)", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}]}
