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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2009.0014 -- AUSCERT ALERT
                               [UNIX/Linux]
                Squid Proxy Cache Security Update Advisory
                               5 March 2009

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        AusCERT Alert Summary
        ---------------------

Product:              Squid 2.7 -> 2.7.STABLE5
                      Squid 3.0 -> 3.0.STABLE12
                      Squid 3.1 -> 3.1.0.4
Publisher:            Squid
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-0478

Original Bulletin:    http://www.squid-cache.org/Advisories/SQUID-2009_1.txt

Revision History:     March     5 2009: Alert Number corrected
                      February 12 2009: Added CVE Reference
                      February  6 2009: Made Document Public
                      February  6 2009: Initial Release

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__________________________________________________________________

       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
__________________________________________________________________

      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.

__________________________________________________________________

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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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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