CVE-2013-6393

Name: CVE-2013-6393
Creator: NVD / NIST
Published: 2014-02-06T22:55:03.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 9.31%

Last modified Jun 17, 2026

CVE-2013-6393 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 9.31% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

9.31%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Pyyaml	Libyaml	<= 0.1.4
Pyyaml	Libyaml	0.0.1
Pyyaml	Libyaml	0.1.1
Pyyaml	Libyaml	0.1.2
Pyyaml	Libyaml	0.1.3
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	12.10
Canonical	Ubuntu Linux	13.10
Redhat	Openstack	3.0
Redhat	Openstack	4.0
Debian	Debian Linux	6.0
Debian	Debian Linux	7.0
Opensuse	Leap	42.1
Opensuse	Opensuse	11.4
Opensuse	Opensuse	13.1
Opensuse	Opensuse	13.2

References

http://advisories.mageia.org/MGASA-2014-0040.htmlThird Party Advisory
http://archives.neohapsis.com/archives/bugtraq/2014-04/0134.htmlBroken Link
http://archives.neohapsis.com/archives/bugtraq/2014-10/0103.htmlBroken Link
http://lists.opensuse.org/opensuse-updates/2014-02/msg00064.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2014-02/msg00065.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-02/msg00078.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-04/msg00050.htmlThird Party Advisory
http://osvdb.org/102716
http://rhn.redhat.com/errata/RHSA-2014-0353.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0354.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0355.htmlThird Party Advisory
http://www.debian.org/security/2014/dsa-2850Third Party Advisory
http://www.debian.org/security/2014/dsa-2870Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2015:060Third Party Advisory
http://www.securityfocus.com/bid/65258Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2098-1Third Party Advisory
https://bitbucket.org/xi/libyaml/commits/tag/0.1.5Issue Tracking
https://bugzilla.redhat.com/attachment.cgi?id=847926&action=diffIssue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1033990Issue Tracking, Patch
https://puppet.com/security/cve/cve-2013-6393
https://support.apple.com/kb/HT6536Third Party Advisory
http://advisories.mageia.org/MGASA-2014-0040.htmlThird Party Advisory
http://archives.neohapsis.com/archives/bugtraq/2014-04/0134.htmlBroken Link
http://archives.neohapsis.com/archives/bugtraq/2014-10/0103.htmlBroken Link
http://lists.opensuse.org/opensuse-updates/2014-02/msg00064.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2014-02/msg00065.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-02/msg00078.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-04/msg00050.htmlThird Party Advisory
http://osvdb.org/102716
http://rhn.redhat.com/errata/RHSA-2014-0353.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0354.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0355.htmlThird Party Advisory
http://www.debian.org/security/2014/dsa-2850Third Party Advisory
http://www.debian.org/security/2014/dsa-2870Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2015:060Third Party Advisory
http://www.securityfocus.com/bid/65258Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2098-1Third Party Advisory
https://bitbucket.org/xi/libyaml/commits/tag/0.1.5Issue Tracking
https://bugzilla.redhat.com/attachment.cgi?id=847926&action=diffIssue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1033990Issue Tracking, Patch
https://puppet.com/security/cve/cve-2013-6393
https://support.apple.com/kb/HT6536Third Party Advisory

Timeline

Published: Feb 6, 2014
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-6393?

How severe is CVE-2013-6393?

Severity scoring for CVE-2013-6393 is pending analysis. The EPSS model estimates a 9.31% probability of exploitation in the next 30 days.

How do I fix CVE-2013-6393?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-6393?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST