Base64 encoding and decoding functions in glib suffer from vulnerabilities during memory allocation which may result in arbitrary code execution when processing large strings. A number of other GNOME-related applications which predate glib are vulnerable due to the commonality of this flawed code.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75680/oCERT-2008-015.txt
Source: https://packetstormsecurity.com/files/75680/Open-Source-CERT-Security-Advisory-2008.15.html