RHSA-2015:1768

Vulnerability from csaf_redhat - Published: 2015-09-10 12:05 - Updated: 2025-11-21 17:53
Summary
Red Hat Security Advisory: libunwind security update

Notes

Topic
Updated libunwind packages that fix one security issue are now available for Red Hat Enterprise Linux OpenStack Platform 5.0 for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Low 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
Libunwind provides a C ABI to determine the call-chain of a program. An off-by-one array indexing error was found in the libunwind API, which could cause an error when reading untrusted binaries or dwarf debug info data. Red Hat products do not call the API in this way; and it is unlikely that any exploitable attack vector exists in current builds or supported usage. (CVE-2015-3239) This issue was discovered by Paolo Bonzini of Red Hat. All users of libunwind are advised to upgrade to these updated packages, which contain a backported patch to correct 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.
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        "text": "Updated libunwind packages that fix one security issue are now available\nfor Red Hat Enterprise Linux OpenStack Platform 5.0 for Red Hat Enterprise\nLinux 6.\n\nRed Hat Product Security has rated this update as having Low security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.",
        "title": "Topic"
      },
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        "text": "Libunwind provides a C ABI to determine the call-chain of a program.\n\nAn off-by-one array indexing error was found in the libunwind API, which\ncould cause an error when reading untrusted binaries or dwarf debug info\ndata. Red Hat products do not call the API in this way; and it is unlikely\nthat any exploitable attack vector exists in current builds or supported\nusage. (CVE-2015-3239)\n\nThis issue was discovered by Paolo Bonzini of Red Hat.\n\nAll users of libunwind are advised to upgrade to these updated packages,\nwhich contain a backported patch to correct this issue.",
        "title": "Details"
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Paolo Bonzini"
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          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2015-3239",
      "cwe": {
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        "name": "Off-by-one Error"
      },
      "discovery_date": "2015-06-08T00:00:00+00:00",
      "ids": [
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          "text": "1232265"
        }
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        {
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          "title": "Vulnerability description"
        },
        {
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          "text": "libunwind: off-by-one in dwarf_to_unw_regnum()",
          "title": "Vulnerability summary"
        },
        {
          "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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        }
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      "release_date": "2015-06-20T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2015-09-10T12:05:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "6Server-RH6-RHOS-5.0:libunwind-0:1.1-4.1.el6ost.x86_64",
            "6Server-RH6-RHOS-5.0:libunwind-debuginfo-0:1.1-4.1.el6ost.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2015:1768"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "products": [
            "6Server-RH6-RHOS-5.0:libunwind-0:1.1-4.1.el6ost.src",
            "6Server-RH6-RHOS-5.0:libunwind-0:1.1-4.1.el6ost.x86_64",
            "6Server-RH6-RHOS-5.0:libunwind-debuginfo-0:1.1-4.1.el6ost.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "libunwind: off-by-one in dwarf_to_unw_regnum()"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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