rhsa-2014_0949
Vulnerability from csaf_redhat
Published
2014-07-28 16:03
Modified
2024-11-05 18:31
Summary
Red Hat Security Advisory: kernel security update

Notes

Topic
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 6.2 Advanced Update Support. 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 packages contain the Linux kernel, the core of any Linux operating system. * It was found that the Linux kernel's ptrace subsystem allowed a traced process' instruction pointer to be set to a non-canonical memory address without forcing the non-sysret code path when returning to user space. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-4699, Important) Note: The CVE-2014-4699 issue only affected systems using an Intel CPU. Red Hat would like to thank Andy Lutomirski for reporting this issue. All kernel users are advised to upgrade to these updated packages, which contain a backported patch to 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.


To clipboard 

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          "text": "It was found that the Linux kernel\u0027s ptrace subsystem allowed a traced process\u0027 instruction pointer to be set to a non-canonical memory address without forcing the non-sysret code path when returning to user space. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.\r\n\r\nNote: The CVE-2014-4699 issue only affected systems using an Intel CPU.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: x86_64: ptrace: sysret to non-canonical address",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5.",
          "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"
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      ],
      "title": "kernel: x86_64: ptrace: sysret to non-canonical address"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.