Asterisk: Multiple vulnerabilities

Background

Asterisk is an open source telephony engine and tool kit.

Description

Asterisk upstream developers reported multiple vulnerabilities:

• The Call Detail Record Postgres logging engine (cdr_pgsql) does not correctly escape the ANI and DNIS arguments before using them in SQL statements (CVE-2007-6170).
• When using database-based registrations (“realtime”) and host-based authentication, Asterisk does not check the IP address when the username is correct and there is no password provided (CVE-2007-6430).
• The SIP channel driver does not correctly determine if authentication is required (CVE-2008-1332).

Impact

Remote authenticated attackers could send specially crafted data to Asterisk to execute arbitrary SQL commands and compromise the administrative database. Remote unauthenticated attackers could bypass authentication using a valid username to hijack other user’s sessions, and establish sessions on the SIP channel without authentication.

Workaround

There is no known workaround at this time.

Resolution

All Asterisk users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.27"