ESB-2018.1737.2 - UPDATE [Win][UNIX/Linux] Asterisk: Multiple vulnerabilities 2018-06-13

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.1737.2
                   Asterisk Project Security Advisories
                               13 June 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Asterisk
Publisher:         Asterisk
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Existing Account      
                   Reduced Security  -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-12228 CVE-2018-12227 

Original Bulletin: 
   http://downloads.asterisk.org/pub/security/AST-2018-007.html
   http://downloads.asterisk.org/pub/security/AST-2018-008.html

Comment: This bulletin contains two (2) Asterisk security advisories.

Revision History:  June 13 2018: Asterisk updated bulletins to include CVEs
                   June 12 2018: Initial Release

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Asterisk Project Security Advisory - AST-2018-007

       Product         Asterisk

       Summary         Infinite loop when reading iostreams

 Nature of Advisory    Denial of Service

   Susceptibility      Remote Authenticated Sessions

      Severity         Critical

   Exploits Known      No

     Reported On       April 16, 2018

     Reported By       Sean Bright

      Posted On        June 11, 2018

   Last Updated On     June 11, 2018

  Advisory Contact     Kevin Harwell <kharwell AT digium DOT com>

      CVE Name         CVE-2018-12228


Description

When connected to Asterisk via TCP/TLS if the client abruptly disconnects, or
sends a specially crafted message then Asterisk gets caught in an infinite loop
while trying to read the data stream. Thus rendering the system as unusable.


Resolution

Stricter error checking is now done when iostreams encounters a problem. When
an error occurs during reading it is now properly handled, and continued
reading is appropriately stopped.


Affected Versions

Product                  Release   Series

Asterisk Open Source     15.x      All Releases


Corrected In

Product                Release

Asterisk Open Source   15.4.1


Patches

                     SVN URL                                             Revision

http://downloads.asterisk.org/pub/security/AST-2018-007-15.diff         Asterisk 15


Links
https://issues.asterisk.org/jira/browse/ASTERISK-27807


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-2018-007.pdf and
http://downloads.digium.com/pub/security/AST-2018-007.html


Revision History

Date                   Editor                   Revisions Made

April 25, 2018       Kevin Harwell              Initial Revision


               Asterisk Project Security Advisory - AST-2018-007
              Copyright (C) 2018 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.

- -------------------------------------------------------------------------------

Asterisk Project Security Advisory - AST-2018-008

       Product         Asterisk

       Summary         PJSIP endpoint presence disclosure when using ACL

 Nature of Advisory    Unauthorized data disclosure

   Susceptibility      Remote Unauthenticated Sessions

      Severity         Minor

   Exploits Known      No

     Reported On       April 19, 2018

     Reported By       John

      Posted On        June 11, 2018

   Last Updated On     June 11, 2018

  Advisory Contact     Rmudgett AT digium DOT com

      CVE Name         CVE-2018-12227


Description

When endpoint specific ACL rules block a SIP request they respond with a 403
forbidden. However, if an endpoint is not identified then a 401 unauthorized
response is sent. This vulnerability just discloses which requests hit a
defined endpoint. The ACL rules cannot be bypassed to gain access to the
disclosed endpoints.


Resolution
Endpoint specific ACL rules now respond with a 401 challenge which is the same
as if an endpoint were not identified. An alternate is to use global ACL rules
to avoid the information disclosure.


Affected Versions

      Product                  Release   Series


Asterisk Open Source             13.x     13.10.0 and later

Asterisk Open Source             14.x     All releases

Asterisk Open Source             15.x     All releases

Certified Asterisk              13.18     All releases

Certified Asterisk              13.21     All releases


Corrected In

Product                 Release

Asterisk Open Source    13.21.1, 14.7.7, 15.4.1

Certified Asterisk      13.18-cert4, 13.21-cert2


Patches

SVN URL                                                             Revision

http://downloads.asterisk.org/pub/security/AST-2018-008-13.diff     Asterisk 13

http://downloads.asterisk.org/pub/security/AST-2018-008-14.diff     Asterisk 14

http://downloads.asterisk.org/pub/security/AST-2018-008-15.diff     Asterisk 15

http://downloads.asterisk.org/pub/security/AST-2018-008-13.18.diff  Certified Asterisk 13.18

http://downloads.asterisk.org/pub/security/AST-2018-008-13.21.diff  Certified Asterisk 13.21


Links

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-2018-008.pdf and
http://downloads.digium.com/pub/security/AST-2018-008.html


Revision History

Date                   Editor                   Revisions Made

May 1, 2018          Richard Mudgett            Initial revision

June 11, 2018        Richard Mudgett            Added Certified Asterisk 13.21


               Asterisk Project Security Advisory - AST-2018-008
              Copyright (C) 2018 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.

- --------------------------END INCLUDED TEXT--------------------

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