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ClamAV Freshclam HTTP Header Buffer Overflow Vulnerability
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Secunia Advisory:
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SA19880
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Release Date:
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2006-05-01
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Popularity:
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11,232 views
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Critical:
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Moderately 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-2006-1989
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Description:
A vulnerability has been reported in ClamAV, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially to compromise a vulnerable system.
The vulnerability is caused due to a boundary error within the HTTP client in the Freshclam command line utility. This can be exploited to cause a stack-based buffer overflow when the HTTP headers received from a web server exceeds 8KB.
Successful exploitation requires that Freshclam is used to download virus signature updates from a malicious mirror web server e.g. via DNS poisoning.
The vulnerability has been reported in version 0.80 through 0.88.1.
Solution:
Update to version 0.88.2.
http://sourceforge.net/project/showfi...?group_id=86638&release_id=407078
Provided and/or discovered by:
The vendor credits Ulf Harnhammar and anonymous researcher from Germany.
Original Advisory:
http://www.clamav.net/security/0.88.2.html
http://www.clamav.net/doc/0.88.2/ChangeLog
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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