asterisk

Several remote vulnerabilities have been discovered in Asterisk, a free
software PBX and telephony toolkit. The Common Vulnerabilities and
Exposures project identifies the following problems:

• CVE-2007-6430
  Tilghman Lesher discovered that database-based registrations are
  insufficiently validated. This only affects setups, which are
  configured to run without a password and only host-based
  authentication.
• CVE-2008-1332
  Jason Parker discovered that insufficient validation of From:
  headers inside the SIP channel driver may lead to authentication
  bypass and the potential external initiation of calls.
• CVE-2008-1333
  This update also fixes a format string vulnerability, which can only be
  triggered through configuration files under control of the local
  administrator. In later releases of Asterisk this issue is remotely
  exploitable and tracked as CVE-2008-1333.

The status of the old stable distribution (sarge) is currently being
investigated. If affected, an update will be released through
security.debian.org.

For the stable distribution (etch), these problems have been fixed in
version 1:1.2.13~dfsg-2etch3.

We recommend that you upgrade your asterisk packages.