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

low Nessus Plugin ID 73022

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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 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.

Solution

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

Plugin Details

Severity: Low

ID: 73022

File Name: asterisk_ast_2014_004.nasl

Version: 1.16

Type: remote

Family: Misc.

Published: 3/14/2014

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: Low

Base Score: 3.5

Temporal Score: 2.6

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

CVSS Score Source: CVE-2014-2289

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: 3/10/2014

Vulnerability Publication Date: 3/10/2014

Reference Information

CVE: CVE-2014-2289

BID: 66096

Detections

Analytics