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Squid Proxy Cache Denial of Service in request handling



Squid Proxy Cache Denial of Service in request handling
Squid Proxy Cache Denial of Service in request handling



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       Squid Proxy Cache Security Update Advisory SQUID-2009:1
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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 
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Problem Description:

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

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Severity:

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

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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.

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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.
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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
. 

  For reporting of non-security bugs in the latest STABLE release
  the squid bugzilla database should be used
. 

  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.

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Credits:

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

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Revision history:

  2009-02-02 13:12 GMT Initial version
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