Bug 452467 - squidGuard: "trailing dot" domain access restriction bypass
Summary: squidGuard: "trailing dot" domain access restriction bypass
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-06-23 07:49 UTC by Tomas Hoger
Modified: 2019-09-29 12:25 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-03-22 15:39:50 UTC

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Description Tomas Hoger 2008-06-23 07:49:54 UTC 
squidGuard upstream published security advisory regarding domain access
restriction bypass affecting systems with squid 3.0:

By adding a trailing dot to the domain it is possible to bypass the filter and
access blocked sites.

This only affects people using squidGuard with squid version 3.0 STABLE1 to
STABLE5 (higher version may be affected as well; in any case, if you are running
squid 3.0 make sure to patch). Squid version 2.6 is known to remove trailing
dots from domains before passing the URLs to squidGuard.

References:
http://www.squidguard.org/Doc/sg-2008-06-13.html
http://bugs.gentoo.org/show_bug.cgi?id=228593

See upstream advisory for patch details.

Squid 3.0 is currently shipped in Fedora 9 and Rawhide.  Fedora 8 still ships
squid 2.6 and shouldn't be affected by this issue.
Comment 1 Gwyn Ciesla 2009-02-12 14:46:38 UTC 
1.2.1-2 with this patched on it's way through bodhi.
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