Some vulnerabilities have been reported in ClamAV, which can potentially be exploited by malicious people to cause a DoS (Denial of Service) or to compromise a vulnerable system.

1) A NULL-pointer dereference error exists within the "cli_scanrtf()" function in libclamav/rtf.c. This can potentially be exploited to crash ClamAV via a specially crafted RTF file.

2) A NULL-pointer dereference error exists within the "cli_html_normalise()" function in libclamav/htmlnorm.c. This can potentially be exploited to crash ClamAV via a specially crafted HTML file containing a "data" URL scheme.

3) The recipient address extracted from email messages is not properly sanitised before being used in a call to "popen()" when executing sendmail. This can be exploited to execute arbitrary code with the privileges of the clamav-milter process by sending an email with a specially crafted recipient address to the affected system.

Successful exploitation requires that clamav-milter is started with the "black hole" mode activated.

The vulnerabilities are reported in versions prior to 0.91.2.

Solution
Update to version 0.91.2.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Reported by the vendor.
2) The vendor credits Stefanos Stamatis.
3) Discovered by Nikolaos Rangos of n.runs AG.

Changelog
Further details available to Secunia VIM customers

Original Advisory
1, 2) http://sourceforge.net/project/shownotes.php?release_id=533658&group_id=86638
3) http://www.nruns.com/security_advisory_clamav_remote_code_exection.php

Deep Links
Links available to Secunia VIM customers