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Asterisk Remote Crash Vulnerability in voice mail application (AST-2012-011)

Low

Synopsis

The remote VoIP server is vulnerable to a denial of service attack.

Description

According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a vulnerability that could allow a remote attacker to crash the server. If a single voicemail account is manipulated by two parties simultaneously, a condition can occur where memory is freed twice causing a crash.

Solution

Upgrade to Asterisk 1.8.13.1 / 10.5.2