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 (CVE-2012-2186).
• An error in Asterisk could cause all RTP ports to be exhausted (CVE-2012-3812).
• A double-free error could occur when two parties attempt to manipulate the same voicemail account simultaneously (CVE-2012-3863).
• Asterisk does not properly implement certain ACL rules (CVE-2012-4737).

Impact

A remote, authenticated attacker could execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or bypass outbound call restrictions.

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-1.8.15.1"