clamav: Crash with crafted chm, CVE-2008-1389

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1389
http://int21.de/cve/CVE-2008-1389-clamav-chd.html
http://www.int21.de/cve/cve-2008-1389-samples.tar.bz2
https://wwws.clamav.net/bugzilla/show_bug.cgi?id=1089

Description

A fuzzing test showed weakness in the chm parser of clamav, which can possibly 
be exploited.
The clamav team has disabled the chm module in older versions though freshclam 
updates and has released 0.94 with a fixed parser.

The clamav team has not mentioned this issue in the release notes of 0.94, 
which is very bad security behaviour.

Disclosure Timeline

2008-07-09: clamav bug opened
unknown date: clamav disables chm-parser through freshclam
2008-09-02 Vendor releases 0.94
2008-09-04 Released this advisory

CVE Information

The Common Vulnerabilities and Exposures (CVE) project has assigned the name 
CVE-2008-1389 to this issue. This is a candidate for inclusion in the CVE 
list (http://cve.mitre.org/), which standardizes names for security problems.

Credits and copyright

This vulnerability was discovered by Hanno Boeck of schokokeks.org webhosting. 
It's licensed under the creative commons attribution license.

Hanno Boeck, 2008-09-04, http://www.hboeck.de

-- 
Hanno Böck    Blog:    http://www.hboeck.de/
GPG: 3DBD3B20    Jabber/Mail:  hanno@hboeck.de