Asterisk SIP Channel Driver Uninitialized Variable Request Parsing DoS (AST-2011-012)

medium Nessus Plugin ID 56922


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 can be crashed remotely by an authenticated user when parsing an invalid SIP URI.


Update to Asterisk / 10.0.0-rc1 or later.

See Also

Plugin Details

Severity: Medium

ID: 56922

File Name: asterisk_ast_2011_012.nasl

Version: 1.15

Type: remote

Published: 11/22/2011

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: Settings/ParanoidReport, asterisk/sip_detected

Exploit Ease: No known exploits are available

Patch Publication Date: 10/17/2011

Vulnerability Publication Date: 10/4/2011

Reference Information

CVE: CVE-2011-4063

BID: 50177