Debian Security Advisory DSA 2171-1 (asterisk)

Summary
The remote host is missing an update to asterisk announced via advisory DSA 2171-1.
Solution
For the oldstable distribution (lenny), this problem has been fixed in version 1.4.21.2~dfsg-3+lenny2. For the stable distribution (squeeze), this problem has been fixed in version 1.6.2.9-2+squeeze1. The unstable distribution (sid) will be fixed soon. We recommend that you upgrade your asterisk packages. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202171-1
Insight
Matthew Nicholson discovered a buffer overflow in the SIP channel driver of Asterisk, an open source PBX and telephony toolkit, which could lead to the execution of arbitrary code.