Jonathan Gray and Stanislaw Pitucha found an assertion failure in the way wrapped strings are parsed in LibYAML, a fast YAML 1.1 parser and emitter library. An attacker able to load specially crafted YAML input into an application using libyaml could cause the application to crash. This update corrects this flaw in the copy that is embedded in the libyaml-libyaml-perl package.

For the stable distribution (wheezy), this problem has been fixed in version 0.38-3+deb7u3. For the upcoming stable distribution (jessie), this problem has been fixed in version 0.41-6. For the unstable distribution (sid), this problem has been fixed in version 0.41-6. We recommend that you upgrade your libyaml-libyaml-perl packages.

YAML::LibYAML (or YAML::XS) is a Perl interface to Kirill Siminov's libyaml library, a YAML Ain't Markup Language (YAML) implementation written in C to support the YAML 1.1 specification. The provided Dump and Load routines are compatible with the Perl YAML module (see libyaml-perl).

libyaml-libyaml-perl on Debian Linux

This check tests the installed software version using the apt package manager.

• http://www.debian.org/security/2014/dsa-3103.html

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Updated on 2015-03-25