[AsteriskBrasil] Fwd: [asterisk-dev] AST-2013-002: Denial of Service in HTTP server

[Sylvio Jollenbeck]

PSC

---------- Forwarded message ----------
From: Asterisk Security Team <security em asterisk.org>
Date: 2013/3/27
Subject: [asterisk-dev] AST-2013-002: Denial of Service in HTTP server
To: asterisk-dev em lists.digium.com


               Asterisk Project Security Advisory - AST-2013-002

          Product         Asterisk
          Summary         Denial of Service in HTTP server
     Nature of Advisory   Denial of Service
       Susceptibility     Remote Unauthenticated Sessions
          Severity        Major
       Exploits Known     None
        Reported On       January 21, 2013
        Reported By       Christoph Hebeisen, TELUS Security Labs
         Posted On        March 27, 2013
      Last Updated On     March 27, 2013
      Advisory Contact    Mark Michelson <mmichelson AT digium DOT com>
          CVE Name        CVE-2013-2686

   Description AST-2012-014 [1], fixed in January of this year, contained a
               fix for Asterisk's HTTP server since it was susceptible to a
               remotely-triggered crash.

               The fix put in place fixed the possibility for the crash to
be
               triggered, but a possible denial of service still exists if
an
               attacker sends one or more HTTP POST requests with very large
               Content-Length values.

               [1]
               http://downloads.asterisk.org/pub/security/AST-2012-014.html

    Resolution  Content-Length is now capped at a maximum value of 1024
                bytes. Any attempt to send an HTTP POST with content-length
                greater than this cap will not result in any memory
                allocated. The POST will be responded to with an HTTP 413
                "Request Entity Too Large" response.

                               Affected Versions
           Product          Release Series
    Asterisk Open Source         1.8.x        1.8.19.1, 1.8.20.0, 1.8.20.1
    Asterisk Open Source         10.x         10.11.1, 10.12.0, 10.12.1
    Asterisk Open Source         11.x         11.1.2, 11.2.0, 11.2.1
     Certified Asterisk         1.8.15        1.8.15-cert1
    Asterisk Digiumphones  10.x-digiumphones  10.11.1-digiumphones,
                                              10.12.0-digiumphones,
                                              10.12.1-digiumphones

                                  Corrected In
                 Product                              Release
          Asterisk Open Source               1.8.20.2, 10.12.2, 11.2.2
           Certified Asterisk                      1.8.15-cert2
          Asterisk Digiumphones                10.12.2-digiumphones

                                     Patches
                                SVN URL
 Revision
http://downloads.asterisk.org/pub/security/AST-2012-014-1.8.diff
Asterisk
                                                                         1.8
http://downloads.asterisk.org/pub/security/AST-2012-014-10.diff
 Asterisk
                                                                         10
http://downloads.asterisk.org/pub/security/AST-2012-014-11.diff
 Asterisk
                                                                         11
http://downloads.asterisk.org/pub/security/AST-2012-014-1.8.15-cert.diffCertified

 Asterisk

 1.8.15


 +------------------------------------------------------------------------+
   |  Links   | https://issues.asterisk.org/jira/browse/ASTERISK-20967
 |
   |          | http://telussecuritylabs.com/threats/show/TSL20130327-01
 |

 +------------------------------------------------------------------------+

    Asterisk Project Security Advisories are posted at
    http://www.asterisk.org/security

    This document may be superseded by later versions; if so, the latest
    version will be posted at
    http://downloads.digium.com/pub/security/AST-2013-002.pdf and
    http://downloads.digium.com/pub/security/AST-2013-002.html

                                Revision History
            Date                  Editor               Revisions Made
    February 12, 2013      Mark Michelson        Initial Draft
    March 27, 2013         Matt Jordan           Updated CVE

               Asterisk Project Security Advisory - AST-2013-002
              Copyright (c) 2013 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in
its
                           original, unaltered form.


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-- 
Sylvio Jollenbeck
www.hosannatecnologia.com.br
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