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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)

Severity: 2/4

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.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/libyaml-buffer-overflow-of-yaml-parser-scan-tag-uri-14239


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