Asterisk REGISTER Request Contact URI Handling DoS (AST-2016-004)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.

Synopsis :

A telephony application running on the remote host is affected by a
denial of service vulnerability.

Description :

According to its SIP banner, the version of Asterisk running on the
remote host is either 13.x prior to 13.8.1 or 13.1-cert prior to
13.1-cert5. It is, therefore, affected by a flaw when processing
incoming REGISTER requests if the REGISTER contains an overlong URI
in the Contact header. An authenticated, remote attacker can exploit
this to cause a denial of service condition.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.

See also :

Solution :

Upgrade to Asterisk version 13.8.1 / 13.1-cert5, or apply the
appropriate patch according to the Asterisk advisory.

Risk factor :

Medium / CVSS Base Score : 6.8

Family: Misc.

Nessus Plugin ID: 90799 ()

Bugtraq ID:


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