Asterisk is vulnerable to two Denial of Service issues in the SIP channel.
|Package||net-misc/asterisk on all architectures|
|Affected versions||< 1.2.14-r2|
|Unaffected versions||>= 1.2.14-r2, revision >= 1.0.12-r2|
Asterisk is an open source implementation of a telephone private branch exchange (PBX).
The Madynes research team at INRIA has discovered that Asterisk contains a null pointer dereferencing error in the SIP channel when handling INVITE messages. Furthermore qwerty1979 discovered that Asterisk 1.2.x fails to properly handle SIP responses with return code 0.
A remote attacker could cause an Asterisk server listening for SIP messages to crash by sending a specially crafted SIP message or answering with a 0 return code.
There is no known workaround at this time.
All Asterisk users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose net-misc/asterisk
Note: Asterisk 1.0.x is no longer supported upstream so users should consider upgrading to Asterisk 1.2.x.
April 02, 2007
April 02, 2007: 01