[asterisk-dev] Certified Asterisk 1.8.11-cert2; Asterisk, 10.4.1 Now Available (Security Release)

Asterisk Development Team asteriskteam at digium.com
Tue May 29 17:00:00 CDT 2012

The Asterisk Development Team has announced security releases for Certified
Asterisk 1.8.11 and Asterisk 1.8 and 10. The available security releases are
released as versions 1.8.11-cert2,, and 10.4.1.

These releases are available for immediate download at

The release of Asterisk 1.8.11-cert2,, and 10.4.1 resolve the following
two issues:

* A remotely exploitable crash vulnerability exists in the IAX2 channel
  driver if an established call is placed on hold without a suggested music
  class. Asterisk will attempt to use an invalid pointer to the music
  on hold class name, potentially causing a crash.

* A remotely exploitable crash vulnerability was found in the Skinny (SCCP)
  Channel driver. When an SCCP client closes its connection to the server,
  a pointer in a structure is set to NULL.  If the client was not in the
  on-hook state at the time the connection was closed, this pointer is later
  dereferenced. This allows remote authenticated connections the ability to
  cause a crash in the server, denying services to legitimate users.

These issues and their resolution are described in the security advisories.

For more information about the details of these vulnerabilities, please read
security advisories AST-2012-007 and AST-2012-008, which were released at the
same time as this announcement.

For a full list of changes in the current releases, please see the ChangeLogs:


The security advisories are available at:

 * http://downloads.asterisk.org/pub/security/AST-2012-007.pdf
 * http://downloads.asterisk.org/pub/security/AST-2012-008.pdf

Thank you for your continued support of Asterisk!

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