The tnef_attachment function in tnef.c for Clam AntiVirus (ClamAV) before 0.87.1 allows remote attackers to cause a denial of service (infinite loop and memory exhaustion) via a crafted value in a CAB file that causes ClamAV to repeatedly scan the same block.
http://www.vupen.com/english/advisories/2005/2294
http://www.securityfocus.com/bid/15316
http://www.mandriva.com/security/advisories?name=MDKSA-2005:205
http://www.idefense.com/application/poi/display?id=333&type=vulnerabilities
http://www.gentoo.org/security/en/glsa/glsa-200511-04.xml
http://www.debian.org/security/2005/dsa-887
http://sourceforge.net/project/shownotes.php?release_id=368319
http://securitytracker.com/id?1015154
http://securityreason.com/securityalert/152
http://secunia.com/advisories/17559
http://secunia.com/advisories/17501
http://secunia.com/advisories/17451