rhsa-2014_1025
Vulnerability from csaf_redhat
Published
2014-08-06 15:49
Modified
2024-11-22 08:17
Summary
Red Hat Security Advisory: kernel security and bug fix update

Notes

Topic
Updated kernel packages that fix one security issue and one bug 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. * A flaw was found in the way the pppol2tp_setsockopt() and pppol2tp_getsockopt() functions in the Linux kernel's PPP over L2TP implementation handled requests with a non-SOL_PPPOL2TP socket option level. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2014-4943, Important) Red Hat would like to thank Sasha Levin for reporting this issue. This update also fixes the following bug: * When a device was registered to a bus, a race condition could occur between the device being added to the list of devices of the bus and binding the device to a driver. As a result, the device could already be bound to a driver which led to a warning and incorrect reference counting, and consequently to a kernel panic on device removal. To avoid the race condition, this update adds a check to identify an already bound device. (BZ#1114409) All kernel users are advised to upgrade to these updated packages, which contain backported patches to 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 packages that fix one security issue and one bug are now\navailable for Red Hat Enterprise Linux 6.2 Advanced Update Support.\n\nThe Red Hat Security Response Team has rated this update as having\nImportant security impact. A Common Vulnerability Scoring System (CVSS)\nbase score, which gives a detailed severity rating, is available from the\nCVE link in the References section.",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Sasha Levin"
          ]
        }
      ],
      "cve": "CVE-2014-4943",
      "discovery_date": "2014-07-12T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1119458"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the way the pppol2tp_setsockopt() and pppol2tp_getsockopt() functions in the Linux kernel\u0027s PPP over L2TP implementation handled requests with a non-SOL_PPPOL2TP socket option level. A local, unprivileged user could use this flaw to escalate their privileges on the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net: pppol2tp: level handling in pppol2tp_[s,g]etsockopt()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the Linux kernel packages as shipped with Red Hat\nEnterprise Linux 5 and Red Hat Enterprise MRG 2.\n\nPlease note that on Red Hat Enterprise Linux 6 pppol2tp module is not\nautomatically loaded when AF_PPPOX/PX_PROTO_OL2TP socket is created as\nRed Hat Enterprise Linux 6 lacks upstream commit 9395a09d05a23bb and default\nmodprobe configuration as shipped with module-init-tools package does not\ncontain the alias for pppol2tp protocol either. As a result, pppol2tp module\nhas to be explicitly enabled and/or loaded by the system administrator.",
          "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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      "scores": [
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          "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"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: net: pppol2tp: level handling in pppol2tp_[s,g]etsockopt()"
    }
  ]
}


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