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

medium Nessus Plugin ID 80036

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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 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.

Solution

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.

Plugin Details

Severity: Medium

ID: 80036

File Name: asterisk_ast_2014_019.nasl

Version: 1.11

Type: remote

Family: Misc.

Published: 12/15/2014

Updated: 4/11/2022

Configuration: Enable paranoid mode, Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2014-9374

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: 12/10/2014

Vulnerability Publication Date: 12/10/2014

Reference Information

CVE: CVE-2014-9374

BID: 71607

Detections

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