#2014-003 LibYAML input sanitization errors
The LibYAML project is an open source YAML 1.1 parser and emitter written in
The library is affected by a heap-based buffer overflow which can lead to
arbitrary code execution. The vulnerability is caused by lack of proper
expansion for the string passed to the yaml_parser_scan_uri_escapes()
A specially crafted YAML file, with a long sequence of percent-encoded
characters in a URL, can be used to trigger the overflow.
LibYAML <= 0.1.5
LibYAML >= 0.1.6
Credit: vulnerability report received from Ivan Fratric of the
Google Security Team.
2014-03-11: vulnerability report received
2014-03-14: maintainer provides patch for review
2014-03-17: reporter confirms patch
2014-03-17: disclosure coordinated on 2014-03-26
2014-03-18: contacted affected vendors
2014-03-18: assigned CVE
2014-03-26: LibYAML 0.1.6 released
2014-03-26: advisory release
Andrea Barisani | Founder & Project Coordinator
oCERT | OSS Computer Security Incident Response Team
0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
"Pluralitas non est ponenda sine necessitate"