[AsteriskBrasil] Fwd: [asterisk-dev] AST-2016-002: File descriptor exhaustion in chan_sip

[Sylvio Jollenbeck]

---------- Forwarded message ----------
From: Asterisk Security Team <security em asterisk.org>
Date: 2016-02-03 23:59 GMT-02:00
Subject: [asterisk-dev] AST-2016-002: File descriptor exhaustion in chan_sip
To: asterisk-dev em lists.digium.com


               Asterisk Project Security Advisory - AST-2016-002

         Product        Asterisk
         Summary        File descriptor exhaustion in chan_sip
    Nature of Advisory  Denial of Service
      Susceptibility    Remote Unauthenticated Sessions
         Severity       Minor
      Exploits Known    Yes
       Reported On      September 17, 2015
       Reported By      Alexander Traud
        Posted On       February 3, 2016
     Last Updated On    February 3, 2016
     Advisory Contact   Richard Mudgett <rmudgett AT digium DOT com>
         CVE Name       Pending

    Description  Setting the sip.conf timert1 value to a value higher than
                 1245 can cause an integer overflow and result in large
                 retransmit timeout times. These large timeout values hold
                 system file descriptors hostage and can cause the system to
                 run out of file descriptors.

    Resolution  Setting the sip.conf timert1 value to 1245 or lower will not
                exhibit the vulnerability. The default timert1 value is 500.
                Asterisk has been patched to detect the integer overflow and
                calculate the previous retransmission timer value.

                               Affected Versions
                         Product                       Release
                                                       Series
                  Asterisk Open Source                  1.8.x   All versions
                  Asterisk Open Source                  11.x    All versions
                  Asterisk Open Source                  12.x    All versions
                  Asterisk Open Source                  13.x    All versions
                   Certified Asterisk                  1.8.28   All versions
                   Certified Asterisk                   11.6    All versions
                   Certified Asterisk                   13.1    All versions

                                  Corrected In
          Product                              Release
    Asterisk Open Source                   11.21.1, 13.7.1
     Certified Asterisk                11.6-cert12, 13.1-cert3

                                      Patches
                                 SVN URL
 Revision
   http://downloads.asterisk.org/pub/security/AST-2016-002-1.8.28.diff
Certified

 Asterisk

 1.8.28
   http://downloads.asterisk.org/pub/security/AST-2016-002-11.6.diff
 Certified

 Asterisk
                                                                       11.6
   http://downloads.asterisk.org/pub/security/AST-2016-002-13.1.diff
 Certified

 Asterisk
                                                                       13.1
   http://downloads.asterisk.org/pub/security/AST-2016-002-1.8.diff
Asterisk
                                                                       1.8
   http://downloads.asterisk.org/pub/security/AST-2016-002-11.diff
 Asterisk
                                                                       11
   http://downloads.asterisk.org/pub/security/AST-2016-002-12.diff
 Asterisk
                                                                       12
   http://downloads.asterisk.org/pub/security/AST-2016-002-13.diff
 Asterisk
                                                                       13

    Links  https://issues.asterisk.org/jira/browse/ASTERISK-25397

    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-2016-002.pdf and
    http://downloads.digium.com/pub/security/AST-2016-002.html

                                Revision History
           Date             Editor                 Revisions Made
    September 29, 2015  Richard Mudgett  Initial document created

               Asterisk Project Security Advisory - AST-2016-002
              Copyright (c) 2015 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
skype: sylvio.jollenbeck
www.hosannatecnologia.com.br
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