A vulnerability has been reported in hyperguard, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the processing of HTTP requests, which can be exploited to exhaust system memory potentially causing a crash by sending specially crafted HTTP requests containing overly large values in the "Content-Length" header.
The vulnerability is reported in the Apache web server module in hyperguard prior to versions 3.1.1-11637, 3.0.3-11636, and 2.5.5-11635.
Solution: Update to version 3.1.1-11637, 3.0.3-11636, or 2.5.5-11635 or later.
Provided and/or discovered by: Michael Kirchner, Wolfgang Neudorfer, and Lukas Nothdurfter (Team h4ck!nb3rg)
Original Advisory: http://www.h4ck1nb3rg.at/wafs/advisory_artofdefence_hyperguard_200907.txt
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Subject: hyperguard "Content-Length" Denial of Service Vulnerability
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