rhsa-2014_1690
Vulnerability from csaf_redhat
Published
2014-10-22 17:20
Modified
2024-11-14 13:11
Summary
Red Hat Security Advisory: python-backports-ssl_match_hostname security update

Notes

Topic
An updated python-backports-ssl_match_hostname package that fixes one security issue is now available for Red Hat Enterprise Linux OpenStack Platform 4.0. 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
The python-backports-ssl_match_hostname package provides RFC 6125 compliant wildcard matching. A denial of service flaw was found in the way Python's SSL module implementation performed matching of certain certificate names. A remote attacker able to obtain a valid certificate that contained multiple wildcard characters could use this flaw to issue a request to validate such a certificate, resulting in excessive consumption of CPU. (CVE-2013-2099) This issue was discovered by Florian Weimer of Red Hat Product Security. All python-backports-ssl_match_hostname users are advised to upgrade to this updated package, which contains 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.


To clipboard 

{
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      "text": "Low"
    },
    "category": "csaf_security_advisory",
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
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      }
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An updated python-backports-ssl_match_hostname package that fixes one\nsecurity issue is now available for Red Hat Enterprise Linux OpenStack\nPlatform 4.0.\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"
      },
      {
        "category": "general",
        "text": "The python-backports-ssl_match_hostname package provides RFC 6125 compliant\nwildcard matching.\n\nA denial of service flaw was found in the way Python\u0027s SSL module\nimplementation performed matching of certain certificate names. A remote\nattacker able to obtain a valid certificate that contained multiple\nwildcard characters could use this flaw to issue a request to validate such\na certificate, resulting in excessive consumption of CPU. (CVE-2013-2099)\n\nThis issue was discovered by Florian Weimer of Red Hat Product Security.\n\nAll python-backports-ssl_match_hostname users are advised to upgrade to\nthis updated package, which contains a backported patch to correct this\nissue.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
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      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
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    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2014:1690",
        "url": "https://access.redhat.com/errata/RHSA-2014:1690"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#low",
        "url": "https://access.redhat.com/security/updates/classification/#low"
      },
      {
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        "summary": "963260",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=963260"
      },
      {
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        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2014/rhsa-2014_1690.json"
      }
    ],
    "title": "Red Hat Security Advisory: python-backports-ssl_match_hostname security update",
    "tracking": {
      "current_release_date": "2024-11-14T13:11:59+00:00",
      "generator": {
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      "id": "RHSA-2014:1690",
      "initial_release_date": "2014-10-22T17:20:57+00:00",
      "revision_history": [
        {
          "date": "2014-10-22T17:20:57+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2014-10-22T17:20:58+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
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          "number": "3",
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      ],
      "status": "final",
      "version": "3"
    }
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                "name": "Red Hat Enterprise Linux OpenStack Platform 4.0",
                "product": {
                  "name": "Red Hat Enterprise Linux OpenStack Platform 4.0",
                  "product_id": "6Server-RHOS-4.0",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openstack:4::el6"
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          },
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            "branches": [
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                "name": "python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.noarch",
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          "product_id": "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.noarch"
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        "relates_to_product_reference": "6Server-RHOS-4.0"
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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Florian Weimer"
          ],
          "organization": "Red Hat Product Security",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2013-2099",
      "cwe": {
        "id": "CWE-407",
        "name": "Inefficient Algorithmic Complexity"
      },
      "discovery_date": "2013-05-15T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "963260"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A denial of service flaw was found in the way Python\u0027s SSL module implementation performed matching of certain certificate names. A remote attacker able to obtain a valid certificate that contained multiple wildcard characters could use this flaw to issue a request to validate such a certificate, resulting in excessive consumption of CPU.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: ssl.match_hostname() DoS via certificates with specially crafted hostname wildcard patterns",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the versions of python as shipped with Red Hat Enterprise Linux 5 and 6 as the SSL module there did not implement the match_hostname() routine yet.",
          "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-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.noarch",
          "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2013-2099"
        },
        {
          "category": "external",
          "summary": "RHBZ#963260",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=963260"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2013-2099",
          "url": "https://www.cve.org/CVERecord?id=CVE-2013-2099"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2013-2099",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-2099"
        }
      ],
      "release_date": "2013-05-15T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2014-10-22T17:20:57+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/articles/11258",
          "product_ids": [
            "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.noarch",
            "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2014:1690"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.6,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "products": [
            "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.noarch",
            "6Server-RHOS-4.0:python-backports-ssl_match_hostname-0:3.4.0.2-1.el6.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "python: ssl.match_hostname() DoS via certificates with specially crafted hostname wildcard patterns"
    }
  ]
}


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