rhsa-2010_0088
Vulnerability from csaf_redhat
Published
2010-02-09 10:01
Modified
2024-11-05 17:13
Summary
Red Hat Security Advisory: kvm security and bug fix update

Notes

Topic
Updated kvm packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5. This update has been rated as having important security impact by the Red Hat Security Response Team.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. The x86 emulator implementation was missing a check for the Current Privilege Level (CPL) and I/O Privilege Level (IOPL). A user in a guest could leverage these flaws to cause a denial of service (guest crash) or possibly escalate their privileges within that guest. (CVE-2010-0298, CVE-2010-0306) A flaw was found in the Programmable Interval Timer (PIT) emulation. Access to the internal data structure pit_state, which represents the data state of the emulated PIT, was not properly validated in the pit_ioport_read() function. A privileged guest user could use this flaw to crash the host. (CVE-2010-0309) A flaw was found in the USB passthrough handling code. A specially-crafted USB packet sent from inside a guest could be used to trigger a buffer overflow in the usb_host_handle_control() function, which runs under the QEMU-KVM context on the host. A user in a guest could leverage this flaw to cause a denial of service (guest hang or crash) or possibly escalate their privileges within the host. (CVE-2010-0297) This update also fixes the following bugs: * pvclock MSR values were not preserved during remote migration, causing time drift for guests. (BZ#537028) * SMBIOS table 4 data is now generated for Windows guests. (BZ#545874) * if the qemu-kvm "-net user" option was used, unattended Windows XP installations did not receive an IP address after reboot. (BZ#546562) * when being restored from migration, a race condition caused Windows Server 2008 R2 guests to hang during shutdown. (BZ#546563) * the kernel symbol checking on the kvm-kmod build process has a safety check for ABI changes. (BZ#547293) * on hosts without high-res timers, Windows Server 2003 guests experienced significant time drift. (BZ#547625) * in some situations, installing Windows Server 2008 R2 from an ISO image resulted in a blue screen "BAD_POOL_HEADER" stop error. (BZ#548368) * a bug in the grow_refcount_table() error handling caused infinite recursion in some cases. This caused the qemu-kvm process to hang and eventually crash. (BZ#552159) * for Windows Server 2003 R2, Service Pack 2, 32-bit guests, an "unhandled vm exit" error could occur during reboot on some systems. (BZ#552518) * for Windows guests, QEMU could attempt to stop a stopped audio device, resulting in a "snd_playback_stop: ASSERT playback_channel->base.active failed" error. (BZ#552519) * the Hypercall driver did not reset the device on power-down. (BZ#552528) * mechanisms have been added to make older savevm versions to be emitted in some cases. (BZ#552529) * an error in the Makefile prevented users from using the source RPM to install KVM. (BZ#552530) * guests became unresponsive and could use up to 100% CPU when running certain benchmark tests with more than 7 guests running simultaneously. (BZ#553249) * QEMU could terminate randomly with virtio-net and SMP enabled. (BZ#561022) All KVM users should upgrade to these updated packages, which contain backported patches to resolve these issues. Note: The procedure in the Solution section must be performed before this update will take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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        "text": "Updated kvm packages that fix multiple security issues and several bugs are\nnow available for Red Hat Enterprise Linux 5.\n\nThis update has been rated as having important security impact by the Red\nHat Security Response Team.",
        "title": "Topic"
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        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for\nthe standard Red Hat Enterprise Linux kernel.\n\nThe x86 emulator implementation was missing a check for the Current\nPrivilege Level (CPL) and I/O Privilege Level (IOPL). A user in a guest\ncould leverage these flaws to cause a denial of service (guest crash) or\npossibly escalate their privileges within that guest. (CVE-2010-0298,\nCVE-2010-0306)\n\nA flaw was found in the Programmable Interval Timer (PIT) emulation. Access\nto the internal data structure pit_state, which represents the data state\nof the emulated PIT, was not properly validated in the pit_ioport_read()\nfunction. A privileged guest user could use this flaw to crash the host.\n(CVE-2010-0309)\n\nA flaw was found in the USB passthrough handling code. A specially-crafted\nUSB packet sent from inside a guest could be used to trigger a buffer\noverflow in the usb_host_handle_control() function, which runs under the\nQEMU-KVM context on the host. A user in a guest could leverage this flaw to\ncause a denial of service (guest hang or crash) or possibly escalate their\nprivileges within the host. (CVE-2010-0297)\n\nThis update also fixes the following bugs: \n\n* pvclock MSR values were not preserved during remote migration, causing\ntime drift for guests. (BZ#537028)\n\n* SMBIOS table 4 data is now generated for Windows guests. (BZ#545874)\n\n* if the qemu-kvm \"-net user\" option was used, unattended Windows XP\ninstallations did not receive an IP address after reboot. (BZ#546562)\n\n* when being restored from migration, a race condition caused Windows\nServer 2008 R2 guests to hang during shutdown. (BZ#546563)\n\n* the kernel symbol checking on the kvm-kmod build process has a safety\ncheck for ABI changes. (BZ#547293)\n\n* on hosts without high-res timers, Windows Server 2003 guests experienced\nsignificant time drift. (BZ#547625)\n\n* in some situations, installing Windows Server 2008 R2 from an ISO image\nresulted in a blue screen \"BAD_POOL_HEADER\" stop error. (BZ#548368)\n\n* a bug in the grow_refcount_table() error handling caused infinite\nrecursion in some cases. This caused the qemu-kvm process to hang and\neventually crash. (BZ#552159)\n\n* for Windows Server 2003 R2, Service Pack 2, 32-bit guests, an \"unhandled\nvm exit\" error could occur during reboot on some systems. (BZ#552518)\n\n* for Windows guests, QEMU could attempt to stop a stopped audio device,\nresulting in a \"snd_playback_stop: ASSERT playback_channel-\u003ebase.active\nfailed\" error. (BZ#552519)\n\n* the Hypercall driver did not reset the device on power-down. (BZ#552528)\n\n* mechanisms have been added to make older savevm versions to be emitted in\nsome cases. (BZ#552529)\n\n* an error in the Makefile prevented users from using the source RPM to\ninstall KVM. (BZ#552530)\n\n* guests became unresponsive and could use up to 100% CPU when running\ncertain benchmark tests with more than 7 guests running simultaneously.\n(BZ#553249)\n\n* QEMU could terminate randomly with virtio-net and SMP enabled.\n(BZ#561022)\n\nAll KVM users should upgrade to these updated packages, which contain\nbackported patches to resolve these issues. Note: The procedure in the\nSolution section must be performed before this update will take effect.",
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  "vulnerabilities": [
    {
      "cve": "CVE-2010-0297",
      "discovery_date": "2010-01-20T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "557025"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Buffer overflow in the usb_host_handle_control function in the USB passthrough handling implementation in usb-linux.c in QEMU before 0.11.1 allows guest OS users to cause a denial of service (guest OS crash or hang) or possibly execute arbitrary code on the host OS via a crafted USB packet.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm-userspace-rhel5: usb-linux.c: fix buffer overflow",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      },
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        {
          "category": "self",
          "summary": "Canonical URL",
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        },
        {
          "category": "external",
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        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2010-0297",
          "url": "https://www.cve.org/CVERecord?id=CVE-2010-0297"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2010-0297",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-0297"
        }
      ],
      "release_date": "2009-10-04T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2010-02-09T10:01:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259\n\nThe following procedure must be performed before this update will take\neffect:\n\n1) Stop all KVM guest virtual machines.\n\n2) Either reboot the hypervisor machine or, as the root user, remove (using\n\"modprobe -r [module]\") and reload (using \"modprobe [module]\") all of the\nfollowing modules which are currently running (determined using \"lsmod\"):\nkvm, ksm, kvm-intel or kvm-amd.\n\n3) Restart the KVM guest virtual machines.",
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            "5Client-VT:kvm-debuginfo-0:83-105.el5_4.22.x86_64",
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          "details": "Moderate"
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      "title": "kvm-userspace-rhel5: usb-linux.c: fix buffer overflow"
    },
    {
      "cve": "CVE-2010-0298",
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        {
          "system_name": "Red Hat Bugzilla ID",
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        }
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          "category": "description",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm: emulator privilege escalation",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "details": "Important"
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      ],
      "title": "kvm: emulator privilege escalation"
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    {
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      "discovery_date": "2010-02-01T00:00:00+00:00",
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        {
          "system_name": "Red Hat Bugzilla ID",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm: emulator privilege escalation IOPL/CPL level check",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-0306"
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            "5Server-VT:kmod-kvm-0:83-105.el5_4.22.x86_64",
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        }
      ],
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          "details": "Important"
        }
      ],
      "title": "kvm: emulator privilege escalation IOPL/CPL level check"
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    {
      "cve": "CVE-2010-0309",
      "discovery_date": "2010-02-02T00:00:00+00:00",
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        {
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        }
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      "notes": [
        {
          "category": "description",
          "text": "The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm: cat /dev/port in guest cause the host hang",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-0309"
        }
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      "release_date": "2010-01-07T00:00:00+00:00",
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          "date": "2010-02-09T10:01:00+00:00",
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          "product_ids": [
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            "5Client-VT:kvm-0:83-105.el5_4.22.src",
            "5Client-VT:kvm-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-tools-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kmod-kvm-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-0:83-105.el5_4.22.src",
            "5Server-VT:kvm-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-tools-0:83-105.el5_4.22.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2010:0088"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 4.9,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
          "products": [
            "5Client-VT:kmod-kvm-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-0:83-105.el5_4.22.src",
            "5Client-VT:kvm-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-105.el5_4.22.x86_64",
            "5Client-VT:kvm-tools-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kmod-kvm-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-0:83-105.el5_4.22.src",
            "5Server-VT:kvm-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-105.el5_4.22.x86_64",
            "5Server-VT:kvm-tools-0:83-105.el5_4.22.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kvm: cat /dev/port in guest cause the host hang"
    }
  ]
}


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