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Multiple AV Products bzip2 Processing Denial of Service Vulnerability
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Secunia Advisory:
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SA10596
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Release Date:
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2004-01-12
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Last Update:
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2004-01-22
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Popularity:
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10,735 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Workaround
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| Software: | Kaspersky Anti-Virus 5.x
McAfee VirusScan 4.x
Trend Micro InterScan VirusWall 3.x
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Description:
Dr. Peter Bieringer has reported a vulnerability in various AV (Anti Virus) products, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to missing limits in the decompression engine when checking bzip2 files. This can be exploited via overly large files to make an affected product consume large amounts of disk space and CPU resources.
The vulnerability has been reported in the following products:
* Kaspersky Anti-Virus for Linux 5.0.1.0 (probably all versions since 4.5)
* McAfee Virus Scan for Linux 4.16.0
* Trend Micro InterScan Viruswall for Linux 3.6 build 1160 and higher
* Trend Micro InterScan Viruswall for Solaris 3.6 build 1160 and higher
* Trend Micro InterScan Viruswall for Sendmail Switch 3.6 + Patch 2
* Trend Micro InterScan Viruswall for Linux 3.8
* Trend Micro InterScan Viruswall for Solaris 3.8
* Trend Micro InterScan Viruswall for AIX 3.6
* Trend Micro InterScan Viruswall for HP-UX 3.6
Other versions and products may also be affected.
Solution:
Filter bzip2 files.
Trend Micro recommends system administrators to set an extraction limit ("extract_limit_size") in the "/etc/iscan/intscan.ini" file.
Provided and/or discovered by:
Dr. Peter Bieringer
Changelog:
2004-01-22: Trend Micro publishes response. Updated "Description" and "Solution" sections.
Original Advisory:
AERAsec:
http://www.aerasec.de/security/advisories/txt/bzip2bomb-antivirusengines.txt
Trend Micro:
http://kb.trendmicro.com/solutions/solutionDetail.asp?solutionId=18198
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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.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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