RHSA-2014:0354
Vulnerability from csaf_redhat
Published
2014-04-02 19:50
Modified
2024-12-06 19:16
Summary
Red Hat Security Advisory: libyaml security update

Notes

Topic
Updated libyaml packages that fix two security issues are now available for Red Hat Enterprise Linux OpenStack Platform 4. The Red Hat Security Response Team has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
YAML is a data serialization format designed for human readability and interaction with scripting languages. LibYAML is a YAML parser and emitter written in C. A buffer overflow flaw was found in the way the libyaml library parsed URLs in YAML documents. An attacker able to load specially crafted YAML input to an application using libyaml could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2014-2525) An integer overflow flaw was found in the way the libyaml library handled excessively long YAML tags. An attacker able to load specially crafted YAML input to application using libyaml could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2013-6393) Red Hat would like to thank oCERT for reporting the CVE-2014-2525 issue. oCERT acknowledges Ivan Fratric of the Google Security Team as the original reporter. The CVE-2013-6393 issue was discovered by Florian Weimer of the Red Hat Product Security Team. All libyaml users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against the libyaml library must be restarted 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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          "names": [
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          ],
          "organization": "Red Hat Product Security Team",
          "summary": "This issue was discovered by Red Hat."
        }
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          "text": "The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "libyaml: heap-based buffer overflow when parsing YAML tags",
          "title": "Vulnerability summary"
        },
        {
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          "text": "The Red Hat security response team has rated this issue as having low security impact in Red Hat Enterpise MRG 1 and 2, CloudForms 3, and Red Hat Network Satellite 5. This issue is not currently planned to be addressed in future updates.Redhat satellite 6 does not ship libyaml\n\nThe Red Hat security response team has rated this issue as having low security impact in Red Hat Update Infrastructure. A future update may address this issue. \n\nThe Red Hat security response team has rated this issue as having moderate security impact in Subscription Asset Manager 1. A future update may address this issue.\n\nFor additional information, refer to the Issue Severity Classification:\nhttps://access.redhat.com/security/updates/classification/",
          "title": "Statement"
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          "url": "https://access.redhat.com/errata/RHSA-2014:0354"
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        {
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            "authentication": "NONE",
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          "text": "Heap-based buffer overflow in the yaml_parser_scan_uri_escapes function in LibYAML before 0.1.6 allows context-dependent attackers to execute arbitrary code via a long sequence of percent-encoded characters in a URI in a YAML file.",
          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
        },
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          "text": "Redhat satellite does not ship libyaml package but instead consumes the package from the RHEL distribution which is why it has been marked as not affected.",
          "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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            "6Server-RHOS-4.0:libyaml-debuginfo-0:0.1.3-1.4.el6.x86_64",
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          "url": "https://access.redhat.com/errata/RHSA-2014:0354"
        },
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            "baseScore": 6.8,
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            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
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          "details": "Important"
        }
      ],
      "title": "libyaml: heap-based buffer overflow when parsing URLs"
    }
  ]
}


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