Vigil@nce - libyaml: buffer overflow of yaml_parser_scan_tag_uri
February 2014 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can generate a buffer overflow of libyaml, in order to trigger a denial of service, and possibly to execute code.
Impacted products: Debian, Fedora, MBS, openSUSE, Puppet, Unix (platform)
Creation date: 12/02/2014
DESCRIPTION OF THE VULNERABILITY
The libyaml library is used to read data files in YAML (YAML Ain’t Markup Language) format.
However, if the size of data is greater than the size of the storage array, an overflow occurs in the yaml_parser_scan_tag_uri() function of the src/scanner.c file.
An attacker can therefore generate a buffer overflow of libyaml, in order to trigger a denial of service, and possibly to execute code.
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