rhsa-2013_0622
Vulnerability from csaf_redhat
Published
2013-03-11 18:31
Modified
2024-11-22 06:38
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic
Updated kernel-rt packages that fix several security issues and three bugs are now available for Red Hat Enterprise MRG 2.3. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues: * A flaw was found in the way file permission checks for the "/dev/cpu/[x]/msr" files were performed in restricted root environments (for example, when using a capability-based security model). A local user with the ability to write to these files could use this flaw to escalate their privileges to kernel level, for example, by writing to the SYSENTER_EIP_MSR register. (CVE-2013-0268, Important) * A race condition was found in the way the Linux kernel's ptrace implementation handled PTRACE_SETREGS requests when the debuggee was woken due to a SIGKILL signal instead of being stopped. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2013-0871, Important) * An out-of-bounds access flaw was found in the way SOCK_DIAG_BY_FAMILY Netlink messages were processed in the Linux kernel. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2013-1763, Important) * It was found that the default SCSI command filter does not accommodate commands that overlap across device classes. A privileged guest user could potentially use this flaw to write arbitrary data to a LUN that is passed-through as read-only. (CVE-2012-4542, Moderate) * A flaw was found in the way the __skb_recv_datagram() function in the Linux kernel processed payload-less socket buffers (skb) when the MSG_PEEK option was requested. A local, unprivileged user could use this flaw to cause a denial of service (infinite loop). (CVE-2013-0290, Moderate) The CVE-2012-4542 issue was discovered by Paolo Bonzini of Red Hat. This update also fixes the following bugs: * There was high contention on run-queue lock when load balancing before idling, causing latency spikes on high CPU core count systems. With this update, IPI is used to send notification to cores with pending work, and the cores push the work rather than trying to pull it, resolving this issue. (BZ#858396) * Previously, ACPI lock was converted to an rt_mutex, leading to a traceback when scheduling while atomic. With this update, ACPI lock has been converted back to a raw spinlock. (BZ#909965) * Fibre Channel (FC)/iSCSI device state was set to off-line and after a timeout, not set back to running. Such a device would not come back online after a fast_io_fail or timeout. With this update, an explicit check for the device being offline has been added, and the device is set back to running when re-initializing, allowing devices to recover after a failure or timeout. (BZ#912942) Users should upgrade to these updated packages, which correct these issues. The system must be rebooted for this update to 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 kernel-rt packages that fix several security issues and three bugs\nare now available for Red Hat Enterprise MRG 2.3.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. Common Vulnerability Scoring System (CVSS) base\nscores, which give detailed severity ratings, are available for each\nvulnerability from the CVE links in the References section.",
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        "text": "The kernel-rt packages contain the Linux kernel, the core of any Linux\noperating system.\n\nThis update fixes the following security issues:\n\n* A flaw was found in the way file permission checks for the\n\"/dev/cpu/[x]/msr\" files were performed in restricted root environments\n(for example, when using a capability-based security model). A local user\nwith the ability to write to these files could use this flaw to escalate\ntheir privileges to kernel level, for example, by writing to the\nSYSENTER_EIP_MSR register. (CVE-2013-0268, Important)\n\n* A race condition was found in the way the Linux kernel\u0027s ptrace\nimplementation handled PTRACE_SETREGS requests when the debuggee was woken\ndue to a SIGKILL signal instead of being stopped. A local, unprivileged\nuser could use this flaw to escalate their privileges. (CVE-2013-0871,\nImportant)\n\n* An out-of-bounds access flaw was found in the way SOCK_DIAG_BY_FAMILY\nNetlink messages were processed in the Linux kernel. A local, unprivileged\nuser could use this flaw to escalate their privileges. (CVE-2013-1763,\nImportant)\n\n* It was found that the default SCSI command filter does not accommodate\ncommands that overlap across device classes. A privileged guest user could\npotentially use this flaw to write arbitrary data to a LUN that is\npassed-through as read-only. (CVE-2012-4542, Moderate)\n\n* A flaw was found in the way the __skb_recv_datagram() function in the\nLinux kernel processed payload-less socket buffers (skb) when the MSG_PEEK\noption was requested. A local, unprivileged user could use this flaw to\ncause a denial of service (infinite loop). (CVE-2013-0290, Moderate)\n\nThe CVE-2012-4542 issue was discovered by Paolo Bonzini of Red Hat.\n\nThis update also fixes the following bugs:\n\n* There was high contention on run-queue lock when load balancing before\nidling, causing latency spikes on high CPU core count systems. With this\nupdate, IPI is used to send notification to cores with pending work, and\nthe cores push the work rather than trying to pull it, resolving this\nissue. (BZ#858396)\n\n* Previously, ACPI lock was converted to an rt_mutex, leading to a\ntraceback when scheduling while atomic. With this update, ACPI lock has\nbeen converted back to a raw spinlock. (BZ#909965)\n\n* Fibre Channel (FC)/iSCSI device state was set to off-line and after a\ntimeout, not set back to running. Such a device would not come back online\nafter a fast_io_fail or timeout. With this update, an explicit check for\nthe device being offline has been added, and the device is set back to\nrunning when re-initializing, allowing devices to recover after a failure\nor timeout. (BZ#912942)\n\nUsers should upgrade to these updated packages, which correct these issues.\nThe system must be rebooted for this update to take effect.",
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          "title": "Vulnerability description"
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        {
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        }
      ],
      "title": "kernel: race condition with PTRACE_SETREGS"
    },
    {
      "cve": "CVE-2013-1763",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "discovery_date": "2013-02-24T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "915052"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Array index error in the __sock_diag_rcv_msg function in net/core/sock_diag.c in the Linux kernel before 3.7.10 allows local users to gain privileges via a large family value in a Netlink message.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: sock_diag: out-of-bounds access to sock_diag_handlers[]",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and 6.\n\nThis issue was addressed in Red Hat Enterprise MRG 2 via RHSA-2013:0622 https://rhn.redhat.com/errata/RHSA-2013-0622.html",
          "title": "Statement"
        },
        {
          "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": {
        "fixed": [
          "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.src",
          "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.6.11-rt30.25.el6rt.noarch",
          "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.6.11-rt30.25.el6rt.noarch",
          "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.6.11-rt30.25.el6rt.x86_64",
          "6Server-MRG-Realtime-2:mrg-rt-release-0:3.6.11-rt30.25.el6rt.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2013-1763"
        },
        {
          "category": "external",
          "summary": "RHBZ#915052",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=915052"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2013-1763",
          "url": "https://www.cve.org/CVERecord?id=CVE-2013-1763"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2013-1763",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-1763"
        }
      ],
      "release_date": "2013-02-24T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2013-03-11T18:31:00+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\nhttps://access.redhat.com/knowledge/articles/11258\n\nTo install kernel packages manually, use \"rpm -ivh [package]\". Do not\nuse \"rpm -Uvh\" as that will remove the running kernel binaries from\nyour system. You may use \"rpm -e\" to remove old kernels after\ndetermining that the new kernel functions properly on your system.",
          "product_ids": [
            "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.6.11-rt30.25.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.6.11-rt30.25.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:mrg-rt-release-0:3.6.11-rt30.25.el6rt.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2013:0622"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "products": [
            "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.6.11-rt30.25.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.6.11-rt30.25.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.6.11-rt30.25.el6rt.x86_64",
            "6Server-MRG-Realtime-2:mrg-rt-release-0:3.6.11-rt30.25.el6rt.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: sock_diag: out-of-bounds access to sock_diag_handlers[]"
    }
  ]
}


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