Log Message:
Upgrade to 1.6.2.18.  This fixes several security issues including:
AST-2011-002, AST-2011-003, AST-2011-004, AST-2011-005, and AST-2011-006.

===========================================================================
1.6.2.18:

The Asterisk Development Team has announced the release of Asterisk 1.6.2.18.

The release of Asterisk 1.6.2.18 resolves several issues reported by the
community and would have not been possible without your participation.
Thank you!

The following is a sample of the issues resolved in this release:

 * Only offer codecs both sides support for directmedia.

 * Resolution of several DTMF based attended transfer issues.
   NOTE: Be sure to read the ChangeLog for more information about these changes.

 * Resolve deadlocks related to device states in chan_sip

 * Fix channel redirect out of MeetMe() and other issues with channel softhangup

 * Fix voicemail sequencing for file based storage.

 * Guard against retransmitting BYEs indefinitely during attended transfers with
   chan_sip.

In addition to the changes listed above, commits to resolve security issues
AST-2011-005 and AST-2011-006 have been merged into this release. More
information about AST-2011-005 and AST-2011-006 can be found at:

http://downloads.asterisk.org/pub/security/AST-2011-005.pdf
http://downloads.asterisk.org/pub/security/AST-2011-006.pdf

For a full list of changes in this release, please see the ChangeLog:

http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-1.6.2.18

===========================================================================
1.6.2.17.3

The Asterisk Development Team has announced security releases for Asterisk
branches 1.4, 1.6.1, 1.6.2, and 1.8. The available security releases are
released as versions 1.4.40.1, 1.6.1.25, 1.6.2.17.3, and 1.8.3.3.

The releases of Asterisk 1.4.40.1, 1.6.1.25, 1.6.2.17.3, and 1.8.3.3 resolve two
issues:

* File Descriptor Resource Exhaustion (AST-2011-005)
* Asterisk Manager User Shell Access (AST-2011-006)

The issues and resolutions are described in the AST-2011-005 and AST-2011-006
security advisories.

For more information about the details of these vulnerabilities, please read the
security advisories AST-2011-005 and AST-2011-006, which were released at the
same time as this announcement.

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

http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.2.17.3

Security advisory AST-2011-005 and AST-2011-006 are available at:

http://downloads.asterisk.org/pub/security/AST-2011-005.pdf
http://downloads.asterisk.org/pub/security/AST-2011-006.pdf

===========================================================================
1.6.2.17.2:

The Asterisk Development Team has announced security releases for Asterisk
branches 1.6.1, 1.6.2, and 1.8. The available security releases are
released as versions 1.6.1.24, 1.6.2.17.2, and 1.8.3.2.

** This is a re-release of Asterisk 1.6.1.23, 1.6.2.17.1 and 1.8.3.1 which
    contained a bug which caused duplicate manager entries (issue #18987).

The releases of Asterisk 1.6.1.24, 1.6.2.17.2, and 1.8.3.2 resolve two issues:

  * Resource exhaustion in Asterisk Manager Interface (AST-2011-003)
  * Remote crash vulnerability in TCP/TLS server (AST-2011-004)

The issues and resolutions are described in the AST-2011-003 and AST-2011-004
security advisories.

For more information about the details of these vulnerabilities, please read the
security advisories AST-2011-003 and AST-2011-004, which were released at the
same time as this announcement.

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

http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.2.17.2

Security advisory AST-2011-003 and AST-2011-004 are available at:

http://downloads.asterisk.org/pub/security/AST-2011-003.pdf
http://downloads.asterisk.org/pub/security/AST-2011-004.pdf

===========================================================================
1.6.2.17.1:

The Asterisk Development Team has announced security releases for Asterisk
branches 1.6.1, 1.6.2, and 1.8. The available security releases are
released as versions 1.6.1.23, 1.6.2.17.1, and 1.8.3.1.

These releases are available for immediate download at
http://downloads.asterisk.org/pub/telephony/asterisk/releases

The releases of Asterisk 1.6.1.23, 1.6.2.17.1, and 1.8.3.1 resolve two issues:

  * Resource exhaustion in Asterisk Manager Interface (AST-2011-003)
  * Remote crash vulnerability in TCP/TLS server (AST-2011-004)

The issues and resolutions are described in the AST-2011-003 and AST-2011-004
security advisories.

For more information about the details of these vulnerabilities, please read the
security advisories AST-2011-003 and AST-2011-004, which were released at the
same time as this announcement.

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

http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.2.17.1

Security advisory AST-2011-003 and AST-2011-004 are available at:

http://downloads.asterisk.org/pub/security/AST-2011-003.pdf
http://downloads.asterisk.org/pub/security/AST-2011-004.pdf

===========================================================================
1.6.2.16.2:

The Asterisk Development Team has announced security releases for Asterisk
branches 1.4, 1.6.1, 1.6.2, and 1.8. The available security releases are
released as versions 1.4.39.2, 1.6.1.22, 1.6.2.16.2, and 1.8.2.4.

The releases of Asterisk 1.4.39.2, 1.6.1.22, 1.6.2.16.2, and 1.8.2.4 resolve an
issue that when decoding UDPTL packets, multiple stack and heap based arrays can
be made to overflow by specially crafted packets. Systems configured for
T.38 pass through or termination are vulnerable. The issue and resolution are
described in the AST-2011-002 security advisory.

For more information about the details of this vulnerability, please read the
security advisory AST-2011-002, which was released at the same time as this
announcement.

For a full list of changes in the current release, please see the ChangeLog:

http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.2.16.2

Security advisory AST-2011-002 is available at:

http://downloads.asterisk.org/pub/security/AST-2011-002.pdf