Joined: 12 May 2004
|Posted: Mon Apr 02, 2007 8:26 pm Post subject: [ GLSA 200704-01 ] Asterisk: Two SIP Denial of Service vulne
|Gentoo Linux Security Advisory
Title: Asterisk: Two SIP Denial of Service vulnerabilities (GLSA 200704-01)
Date: April 02, 2007
Asterisk is vulnerable to two Denial of Service issues in the SIP channel.
Asterisk is an open source implementation of a telephone private branch exchange (PBX).
Vulnerable: < 1.2.14-r2
Unaffected: >= 1.2.14-r2
Unaffected: >= 1.0.12-r2 < 1.0.13
Architectures: All supported architectures
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:
Note: Asterisk 1.0.x is no longer supported upstream so users should consider upgrading to Asterisk 1.2.x.
|# emerge --sync
# emerge --ask --oneshot --verbose net-misc/asterisk