Asterisk 'res_http_websocket' Double-Free DoS (AST-2014-019)

Medium Nessus Plugin ID 80036


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 double-free error related to the 'res_http_websocket' module and handling of zero-length payloads that could allow denial of service attacks.

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 11.14.2 / 12.7.2 / 13.0.2 / 11.6-cert9 or apply the appropriate patch listed in the Asterisk advisory.

Alternatively, as a workaround, disable the built-in HTTP server.

See Also

Plugin Details

Severity: Medium

ID: 80036

File Name: asterisk_ast_2014_019.nasl

Version: $Revision: 1.8 $

Type: remote

Family: Misc.

Published: 2014/12/15

Modified: 2016/11/11

Dependencies: 63202

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.7

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

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

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: 2014/12/10

Vulnerability Publication Date: 2014/12/10

Reference Information

CVE: CVE-2014-9374

BID: 71607

OSVDB: 115620