Jonathan Gray and Stanislaw Pitucha found an assertion failure in the way wrapped strings are parsed in Python-YAML, a YAML parser and emitter for Python. An attacker able to load specially crafted YAML input into an application using python-yaml could cause the application to crash.

For the stable distribution (wheezy), this problem has been fixed in version 3.10-4+deb7u1. For the upcoming stable distribution (jessie), this problem has been fixed in version 3.11-2. For the unstable distribution (sid), this problem has been fixed in version 3.11-2. We recommend that you upgrade your pyyaml packages.

pyyaml on Debian Linux

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

• http://www.debian.org/security/2014/dsa-3115.html

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Updated on 2015-03-25