Format string vulnerability in Brian Wotring Osiris before 4.2.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via unspecified attack vectors related to the logging functions.
http://www.vupen.com/english/advisories/2006/3072
http://www.securityfocus.com/bid/19213
http://www.debian.org/security/2006/dsa-1129
http://secunia.com/advisories/21265
http://secunia.com/advisories/21257