Asterisk Endpoint Provisional Response Parsing RTP Port Consumption Remote DoS (AST-2012-010)

medium Nessus Plugin ID 60064

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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 vulnerability that could allow a remote, authenticated attacker to exhaust the server of resources.

If an endpoint sends a provisional response to the server's re-INVITE message, certain data structures are not freed. More iterations of this sequence lead to exhaustion of all available RTP ports.

Solution

Upgrade to Asterisk Open Source 1.8.13.1 / 10.5.2, Business Edition C.3.7.5, Certified Asterisk 1.8.11-cert4 or apply the patches listed in the Asterisk advisory.

Plugin Details

Severity: Medium

ID: 60064

File Name: asterisk_ast_2012_010.nasl

Version: 1.11

Type: remote

Family: Misc.

Published: 7/19/2012

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: 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: 7/5/2012

Vulnerability Publication Date: 7/5/2012

Reference Information

CVE: CVE-2012-3863

BID: 54327

Detections

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