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CVE-2013-6393

6.8 · MEDIUM

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 ex…

Published Feb 6, 2014pyyamlCWE-119EPSS 7.39%

Overview

CVE-2013-6393 is a medium-severity vulnerability affecting pyyaml libyaml. It was published on February 6, 2014 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from pyyaml. Update libyaml to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
pyyamllibyaml0Affected

References

Refadvisories.mageia.org/MGASA-2014-0040.htmlRefarchives.neohapsis.com/archives/bugtraq/2014-04/0134.htmlRefarchives.neohapsis.com/archives/bugtraq/2014-10/0103.htmlReflists.opensuse.org/opensuse-updates/2014-02/msg00064.htmlReflists.opensuse.org/opensuse-updates/2014-02/msg00065.htmlReflists.opensuse.org/opensuse-updates/2015-02/msg00078.htmlReflists.opensuse.org/opensuse-updates/2016-04/msg00050.htmlRefosvdb.org/102716Refrhn.redhat.com/errata/RHSA-2014-0353.htmlRefrhn.redhat.com/errata/RHSA-2014-0354.html

How CyberStrike helps

Frequently asked questions

What is CVE-2013-6393?

CVE-2013-6393 is a medium-severity vulnerability affecting pyyaml libyaml. It was published on February 6, 2014 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2013-6393?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-6393?

Check the references section for vendor advisories and patches from pyyaml. Update libyaml to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-6393?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-6393 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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