Asterisk: Multiple vulnerabilities

Background

Asterisk is an open source telephony engine and toolkit.

Description

Multiple vulnerabilities have been found in Asterisk:

• An error in manager.c allows shell access through the MixMonitor application, GetVar, or Status (CVE-2012-2414).
• An error in chan_skinny.c could cause a heap-based buffer overflow (CVE-2012-2415).
• An error in chan_sip.c prevents Asterisk from checking if a channel exists before connected line updates (CVE-2012-2416).
• An error in chan_iax2.c may cause an invalid pointer to be called (CVE-2012-2947).
• chan_skinny.c contains a NULL pointer dereference (CVE-2012-2948).

Impact

A remote attacker could execute arbitrary code with the privileges of the process or cause a Denial of Service condition.

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-1.8.12.1"