From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Oct 23 2009 - 13:00:11 CDT

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TITLE:
squidGuard Multiple Filter Bypass Security Issues

SECUNIA ADVISORY ID:
SA37107

VERIFY ADVISORY:
http://secunia.com/advisories/37107/

DESCRIPTION:
Some security issues have been reported in squidGuard, which can be
exploited by malicious people to bypass certain security
restrictions.

1) A boundary error in sgLog.c can be exploited to put the
application in emergency mode and disable the filter via an overly
long URL containing multiple '/' characters.

2) Two errors in the processing of overly long URLs can be exploited
to bypass the URL filter.

The security issues are reported in versions 1.3 and 1.4. Prior
versions may also be affected.

SOLUTION:
Apply patches.

squidGuard 1.3:
http://www.squidguard.org/Downloads/Patches/1.3/squidGuard-1.3-patch-20091015.tar.gz
http://www.squidguard.org/Downloads/Patches/1.3/squidGuard-1.3-patch-20091019.tar.gz

squidGuard 1.4:
http://www.squidguard.org/Downloads/Patches/1.4/squidGuard-1.4-patch-20091015.tar.gz
http://www.squidguard.org/Downloads/Patches/1.4/squidGuard-1.4-patch-20091019.tar.gz

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091015
http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091019

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