Asterisk Remote Crash Vulnerability in SIP Channel Driver (AST-2012-006)

low Nessus Plugin ID 58906
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Synopsis

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

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. This issue could be exploited by sending an UPDATE over a SIP channel after the channel dialog has been destroyed, but before the SIP dialog associated with the call has been destroyed.

Only servers that have 'trustrpid' set to 'True' are affected.

Solution

Upgrade to Asterisk 1.8.11.1 / 10.3.1 / C.3.7.4 or apply the patches listed in the Asterisk advisory. Alternatively, set 'trustrpid' to 'False'.

See Also

http://downloads.asterisk.org/pub/security/AST-2012-006.html

https://issues.asterisk.org/jira/browse/ASTERISK-19770

Plugin Details

Severity: Low

ID: 58906

File Name: asterisk_ast_2012_006.nasl

Version: 1.13

Type: remote

Family: Misc.

Published: 4/27/2012

Updated: 6/27/2018

Dependencies: asterisk_detection.nasl

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Medium

Score: 5.8

CVSS v2

Risk Factor: Low

Base Score: 3.5

Temporal Score: 2.6

Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 4/23/2012

Vulnerability Publication Date: 4/16/2012

Reference Information

CVE: CVE-2012-2416

BID: 53205