Asterisk SIP File Descriptor Exhaustion with chan_sip Session-Timers DoS (AST-2014-002)

low Nessus Plugin ID 73020

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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 denial of service flaw exists with the SIP INVITE request handling. It is possible for a remote attacker to use all available file descriptors using SIP INVITE requests. These file descriptors cannot be released without restarting Asterisk, which could allow an attacker to bypass intrusion detection systems.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Asterisk 1.8.26.1 / 11.8.1 / 12.1.1 / Certified Asterisk 1.8.15-cert5 / 11.6-cert2, or apply the appropriate patch listed in the Asterisk advisory.

Plugin Details

Severity: Low

ID: 73020

File Name: asterisk_ast_2014_002.nasl

Version: 1.15

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: 3.4

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-2014-2287

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-2014-2287

BID: 66094

Detections

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