Asterisk Multiple Vulnerabilities (AST-2011-013 / AST-2011-014)
Medium Nessus Plugin ID 57289
Synopsis
A telephony application running on the remote host is affected by multiple vulnerabilities.
Description
According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by the following vulnerabilities :
- An issue in the SIP protocol can lead to the enumeration of endpoints with NAT settings different from the default. Note that this is an issue with the SIP protocol itself, and that updated versions of Asterisk provide warnings and safer defaults. (AST-2011-013)
- A NULL pointer derefererence can lead to an application crash by a remote, unauthenticated user when processing a SIP request. Note that successful exploitation requires that the 'automon' feature in features.conf be enabled and that it is not by default. (AST-2011-014)
Solution
Either update to Asterisk 1.6.2.21 / 1.8.7.2 or later or disable the 'automon' feature in features.conf.