The OLE2 parser in Clam AntiVirus (ClamAV) allows remote attackers to cause a denial of service (resource consumption) via an OLE2 file with (1) a large property size or (2) a loop in the FAT file block chain that triggers an infinite loop, as demonstrated via a crafted DOC file.

References

• https://nvd.nist.gov/vuln/detail/CVE-2007-2650
• http://article.gmane.org/gmane.comp.security.virus.clamav.devel/2853
• http://kolab.org/security/kolab-vendor-notice-15.txt
• http://lurker.clamav.net/message/20070418.111144.0df6c5d3.en.html
• http://secunia.com/advisories/25244
• http://secunia.com/advisories/25523
• http://secunia.com/advisories/25525
• http://secunia.com/advisories/25553
• http://secunia.com/advisories/25558
• http://secunia.com/advisories/25688
• http://secunia.com/advisories/25796
• http://security.gentoo.org/glsa/glsa-200706-05.xml
• http://svn.clamav.net/svn/clamav-devel/trunk/ChangeLog
• http://www.debian.org/security/2007/dsa-1320
• http://www.mandriva.com/security/advisories?name=MDKSA-2007:115
• http://www.novell.com/linux/security/advisories/2007_33_clamav.html
• http://www.securityfocus.com/bid/24316
• http://www.trustix.org/errata/2007/0020/
• http://www.vupen.com/english/advisories/2007/1776