rhsa-2017_1490
Vulnerability from csaf_redhat
Published
2017-06-19 17:43
Modified
2024-11-14 21:43
Summary
Red Hat Security Advisory: kernel security update

Notes

Topic
An update for kernel is now available for Red Hat Enterprise Linux 6.4 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult. (CVE-2017-1000364, Important) Red Hat would like to thank Qualys Research Labs for reporting this issue.
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": "This is a kernel-side mitigation. For a related glibc mitigation please see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-1000366 .",
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          "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.",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1462165"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. Linux Kernel version 4.11.5 is affected.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Incorrectly mapped contents of PIE executable",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue was part of the stack guard fixes that was fixed along side the CVE-2017-1000364 flaw.  This issue has previously affected Red Hat Enterprise Linux 5,6,7 and MRG-2.  This issue is currently fixed in most versions of shipping products.",
          "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": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2017-1000379"
        },
        {
          "category": "external",
          "summary": "RHBZ#1462165",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1462165"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2017-1000379",
          "url": "https://www.cve.org/CVERecord?id=CVE-2017-1000379"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-1000379",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-1000379"
        },
        {
          "category": "external",
          "summary": "https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt",
          "url": "https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt"
        }
      ],
      "release_date": "2017-06-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2017-06-19T17:43:38+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.9,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kernel: Incorrectly mapped contents of PIE executable"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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