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TITLE:
Squid "strListGetItem()" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA36378

VERIFY ADVISORY:
http://secunia.com/advisories/36378/

DESCRIPTION:
A vulnerability has been reported in Squid, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the "strListGetItem()"
function when parsing external authentication headers. This can be
exploited to trigger the execution of an infinite loop via a header
containing ',' characters.

Successful exploitation requires that an "external_acl_type"
configuration option defining a delimiter different from ',' is
present.

The vulnerability is reported in version 2.7.STABLE3. Other versions
may also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Matt Benjamin

ORIGINAL ADVISORY:
http://www.squid-cache.org/bugs/show_bug.cgi?id=2541

OTHER REFERENCES:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=534982
https://bugzilla.redhat.com/show_bug.cgi?id=518182

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