CVE-2013-6393
CVE-2013-6393 is a medium-severity vulnerability in Redhat Openstack with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: Medium (CVSS 2.0 base score 6.8)
- EPSS exploit prediction: 7% (94th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Redhat Openstack
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2013-6393?
- 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.
- How severe is CVE-2013-6393?
- CVE-2013-6393 has a CVSS 2.0 base score of 6.8, rated medium severity.
- Is CVE-2013-6393 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2013-6393?
- CVE-2013-6393 primarily affects Redhat Openstack. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2013-6393?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2013-6393 published?
- CVE-2013-6393 was published on 2014-02-06 and last updated on 2026-06-17.
References
- http://advisories.mageia.org/MGASA-2014-0040.html
- http://archives.neohapsis.com/archives/bugtraq/2014-04/0134.html
- http://archives.neohapsis.com/archives/bugtraq/2014-10/0103.html
- http://lists.opensuse.org/opensuse-updates/2014-02/msg00064.html
- http://lists.opensuse.org/opensuse-updates/2014-02/msg00065.html
- http://lists.opensuse.org/opensuse-updates/2015-02/msg00078.html
- http://lists.opensuse.org/opensuse-updates/2016-04/msg00050.html
- http://osvdb.org/102716
- http://rhn.redhat.com/errata/RHSA-2014-0353.html
- http://rhn.redhat.com/errata/RHSA-2014-0354.html
- http://rhn.redhat.com/errata/RHSA-2014-0355.html
- http://www.debian.org/security/2014/dsa-2850
- http://www.debian.org/security/2014/dsa-2870
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:060
- http://www.securityfocus.com/bid/65258
- http://www.ubuntu.com/usn/USN-2098-1
- https://bitbucket.org/xi/libyaml/commits/tag/0.1.5
- https://bugzilla.redhat.com/attachment.cgi?id=847926&action=diff
- https://bugzilla.redhat.com/show_bug.cgi?id=1033990
- https://puppet.com/security/cve/cve-2013-6393
- https://support.apple.com/kb/HT6536
Affected products (16)
- cpe:2.3:a:pyyaml:libyaml:*:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:libyaml:0.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:libyaml:0.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:libyaml:0.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:pyyaml:libyaml:0.1.3:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
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