chmlib before 0.39 allows user-assisted remote attackers to execute arbitrary code via a crafted page block length in a CHM file, which triggers memory corruption.
http://www.vupen.com/english/advisories/2007/0361
http://www.securityfocus.com/bid/22258
http://www.novell.com/linux/security/advisories/2007_3_sr.html
http://securitytracker.com/id?1017565
http://security.gentoo.org/glsa/glsa-200702-12.xml
http://secunia.com/advisories/24335
http://secunia.com/advisories/23975
http://morte.jedrea.com/~jedwin/projects/chmlib/
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=468