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Amavis file Integer Underflow and Denial of Service
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Secunia Advisory:
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SA25578
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Release Date:
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2007-06-06
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Popularity:
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3,537 views
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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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Partial Fix
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| Software: | AMaViS (A Mail Virus Scanner) 0.x
amavisd-new 2.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2007-2026
CVE-2007-2799
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Description:
A vulnerability and a security issue have been reported in Amavis, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially to compromise a vulnerable system.
1) An integer underflow error in the "file" utility can be exploited to cause a heap-based buffer overflow.
For more information:
SA24548
2) The problem is caused due to certain regular expressions in "file", which can consume all available CPU resources when identifying a specially crafted file.
For more information:
SA24918
Solution:
The vendor recommends updating to file version 4.21 or later and editing the "magic" file (see vendor advisory for details).
Provided and/or discovered by:
Reported by the vendor.
Original Advisory:
http://www.amavis.org/security/asa-2007-3.txt
Other References:
SA24548:
http://secunia.com/advisories/24548/
SA24918:
http://secunia.com/advisories/24918/
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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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