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  DoS против proxy-сервера Squid

From:Amos Jeffries <amos_(at)_treenet.co.nz>
Date:4 февраля 2009 г.
Subject:Squid Proxy Cache Denial of Service in request handling

__________________________________________________________________

      Squid Proxy Cache Security Update Advisory SQUID-2009:1
__________________________________________________________________

Advisory ID:            SQUID-2009:1
Date:                   February 02, 2009
Summary:                Denial of service in request processing
Affected versions:      Squid 2.7 -> 2.7.STABLE5,
                        Squid 3.0 -> 3.0.STABLE12,
                        Squid 3.1 -> 3.1.0.4
Fixed in version:       Squid 2.7.STABLE6, 3.0.STABLE13, 3.1.0.5
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     http://www.squid-cache.org/Advisories/SQUID-2009_1.txt
__________________________________________________________________

Problem Description:

 Due to an internal error Squid is vulnerable to a denial
 of service attack when processing specially crafted requests.

__________________________________________________________________

Severity:

 This problem allows any client to perform a denial of service
 attack on the Squid service.

__________________________________________________________________

Updated Packages:

 This bug is fixed by Squid versions 2.7.STABLE6, 3.0.STABLE13,
 and 3.1.0.5.

 In addition, patches addressing this problem can be found In
 our patch archives:

Squid 2.7:
   http://www.squid-cache.org/Versions/v2/2.7/changesets/12432.patch
   http://www.squid-cache.org/Versions/v2/2.7/changesets/12442.patch

Squid 3.0:
   http://www.squid-cache.org/Versions/v3/3.0/changesets/b8964.patch
   http://www.squid-cache.org/Versions/v3/3.0/changesets/b8965.patch

Squid 3.1:
   http://www.squid-cache.org/Versions/v3/3.1/changesets/b9414.patch
   http://www.squid-cache.org/Versions/v3/3.1/changesets/b9418.patch


 If you are using a prepackaged version of Squid then please refer
 to the package vendor for availability information on updated
 packages.

__________________________________________________________________

Determining if your version is vulnerable:

 All Squid-2.7 versions up to, and including 2.7.STABLE5 are
 vulnerable.

 All Squid-3.0 versions up to and including 3.0.STABLE12 are
 vulnerable.

 All Squid-3.1 beta versions up to and including 3.1.0.4 are
 vulnerable.

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Workarounds:

 None.
__________________________________________________________________

Contact details for the Squid project:

 For installation / upgrade support on binary packaged versions
 of Squid: Your first point of contact should be your binary
 package vendor.

 If your install and build Squid from the original Squid sources
 then the squid-users@squid-cache.org mailing list is your primary
 support point. For subscription details see
 <http://www.squid-cache.org/Support/mailing-lists.html>.

 For reporting of non-security bugs in the latest STABLE release
 the squid bugzilla database should be used
 <http://www.squid-cache.org/bugs/>.

 For reporting of security sensitive bugs send an email to the
 squid-bugs@squid-cache.org mailing list. It's a closed list
 (though anyone can post) and security related bug reports are
 treated in confidence until the impact has been established.

__________________________________________________________________

Credits:

 The vulnerability was discovered by Joshua Morin, Mikko Varpiola
 and Jukka Taimisto from the CROSS project at Codenomicon Ltd.

__________________________________________________________________

Revision history:

 2009-02-02 13:12 GMT Initial version
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END

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