rhsa-2012_0061
Vulnerability from csaf_redhat
Published
2012-01-24 21:28
Modified
2024-11-22 04:57
Summary
Red Hat Security Advisory: kernel-rt security update

Notes

Topic
Updated kernel-rt packages that fix one security issue are now available for Red Hat Enterprise MRG 2.1. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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 issue: * It was found that permissions were not checked properly in the Linux kernel when handling the /proc/[pid]/mem writing functionality. A local, unprivileged user could use this flaw to escalate their privileges. Refer to Red Hat Knowledgebase article DOC-69129, linked to in the References, for further information. (CVE-2012-0056, Important) Red Hat would like to thank Jüri Aedla for reporting this issue. Users should upgrade to these updated packages, which correct this issue. 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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        "category": "default_component_of",
        "full_product_name": {
          "name": "kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2",
          "product_id": "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64"
        },
        "product_reference": "kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
        "relates_to_product_reference": "6Server-MRG-Realtime-2"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64 as a component of Red Hat MRG Realtime for RHEL 6 Server v.2",
          "product_id": "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64"
        },
        "product_reference": "kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64",
        "relates_to_product_reference": "6Server-MRG-Realtime-2"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "J\u00fcri Aedla"
          ]
        }
      ],
      "cve": "CVE-2012-0056",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "discovery_date": "2012-01-18T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "782642"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/\u003cpid\u003e/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: proc: /proc/\u003cpid\u003e/mem mem_write insufficient permission checking",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as it did not backport the upstream commit 198214a7ee. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0052.html and  https://rhn.redhat.com/errata/RHSA-2012-0061.html. For more information, please read https://access.redhat.com/kb/docs/DOC-69129.",
          "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-0:3.0.9-rt26.46.el6rt.src",
          "6Server-MRG-Realtime-2:kernel-rt-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.0.9-rt26.46.el6rt.x86_64",
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          "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.0.9-rt26.46.el6rt.noarch",
          "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.0.9-rt26.46.el6rt.noarch",
          "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
          "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2012-0056"
        },
        {
          "category": "external",
          "summary": "RHBZ#782642",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=782642"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2012-0056",
          "url": "https://www.cve.org/CVERecord?id=CVE-2012-0056"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-0056",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-0056"
        }
      ],
      "release_date": "2012-01-18T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2012-01-24T21:28:00+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/kb/docs/DOC-11259\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-0:3.0.9-rt26.46.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.0.9-rt26.46.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.0.9-rt26.46.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
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            "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.0.9-rt26.46.el6rt.x86_64",
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            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2012:0061"
        }
      ],
      "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-0:3.0.9-rt26.46.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-0:3.0.9-rt26.46.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-0:3.0.9-rt26.46.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-0:3.0.9-rt26.46.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-0:3.0.9-rt26.46.el6rt.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: proc: /proc/\u003cpid\u003e/mem mem_write insufficient permission checking"
    }
  ]
}


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