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ClamAV Multiple Vulnerabilities
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Secunia Advisory:
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SA26530
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Release Date:
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2007-08-22
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Last Update:
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2007-09-03
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Clam AntiVirus (clamav) 0.x
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| | CVE reference: | CVE-2007-4510 (Secunia mirror)
CVE-2007-4560 (Secunia mirror)
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Description:
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.
http://sourceforge.net/project/showfi...ackage_id=90197&release_id=533658
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:
2007-08-27: Added vulnerability #3, raised criticality.
2007-09-03: Added CVE references.
Original Advisory:
1, 2) http://sourceforge.net/project/showno...?release_id=533658&group_id=86638
3) http://www.nruns.com/security_advisory_clamav_remote_code_exection.php
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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