Asterisk PJSIP Channel Driver Subscription DoS (AST-2014-004)

Medium Nessus Plugin ID 73022


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


According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a denial of service vulnerability.

A flaw exists in the PJSIP channel driver when handling 'SUBSCRIBE' requests. When Asterisk receives a 'SUBSCRIBE' request for a presence Event, with no Accept headers, it will try to access an invalid pointer to that header location. A remote attacker could exploit this flaw by sending a specially crafted request to cause the program to crash.

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


Upgrade to Asterisk 12.1.0 or apply the appropriate patch listed in the Asterisk advisory.

See Also

Plugin Details

Severity: Medium

ID: 73022

File Name: asterisk_ast_2014_004.nasl

Version: $Revision: 1.12 $

Type: remote

Family: Misc.

Published: 2014/03/14

Modified: 2016/11/11

Dependencies: 63202

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.6

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/03/10

Vulnerability Publication Date: 2014/03/10

Reference Information

CVE: CVE-2014-2289

BID: 66096

OSVDB: 104324