The Asterisk Development Team has announced security releases for Asterisk as the following versions: * 1.2.36 * 1.4.26.3 * 1.6.0.17 * 1.6.1.9 These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/ The release of 1.2.36 resolves an issue where sending a REGISTER with a differing username in the From URI and Authorization header would reveal whether it was valid or not. For more information about the details of this vulnerability, please read the security advisory AST-2009-008, which was released at the same time as this announcement. The releases of Asterisk 1.4.26.3, 1.6.0.17, and 1.6.1.9 include the fix described in security advisory AST-2009-008, and also contain a fix where it may be possible for someone to execute a cross-site AJAX request exploit. For more information about the details of this vulnerability, please read the security advisory AST-2009-009, which was released at the same time as this announcement. In addition, Asterisk users may notice that we skipped the version number 1.6.0.16. This was intentional, in an effort to avoid confusion about what a particular release contains. Asterisk 1.6.0.16 had candidates for release made, so backtracking on those changes in a release with the same version number might be confusing. The next release candidate, which would have been 1.6.0.16-rc3, will be released with additional changes as 1.6.0.18-rc1. Also of note, that the previous release announcement for 1.6.1.8 stated that the next set of 1.6.1 release candidates would be 1.6.1.9-rc1. As release candidates for 1.6.1.9 were not yet released, 1.6.1.9 is only a security release, and the next release candidate in the 1.6.1 series is expected to be 1.6.1.10-rc1. For a full list of changes in the current releases, please see the ChangeLog: http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.2.36 http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-1.4.26.3 http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-1.6.0.17 http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-1.6.1.9 Security advisory AST-2009-008 is available at: http://downloads.asterisk.org/pub/security/AST-2009-008.pdf Security advisory AST-2009-009 is available at: http://downloads.asterisk.org/pub/security/AST-2009-009.pdf Thank you for your continued support of Asterisk!