Asterisk Remote Crash Vulnerability in Skinny Channel Driver (AST-2012-008)

Medium Nessus Plugin ID 59504

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VPR Score: 3.6

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 attacker to crash the server. This issue could be exploited when the attacker has a valid SCCP (Skinny) ID and closes a connection when in certain call states. A NULL pointer is left behind and can cause the server to crash when the pointer is later dereferenced.

Solution

Upgrade to Asterisk 1.8.12.1 / 10.4.1 / 1.8.11-cert-2 or apply the patches listed in the Asterisk advisory.

See Also

https://issues.asterisk.org/jira/browse/ASTERISK-19905

http://downloads.asterisk.org/pub/security/AST-2012-008.html

Plugin Details

Severity: Medium

ID: 59504

File Name: asterisk_ast_2012_008.nasl

Version: 1.12

Type: remote

Family: Misc.

Published: 2012/06/14

Updated: 2019/12/04

Dependencies: 63202

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2012-2948

CVSS v2.0

Base Score: 4

Temporal Score: 3

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

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

Vulnerability Information

CPE: cpe:/a:digium:asterisk

Required KB Items: asterisk/sip_detected, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2012/05/29

Vulnerability Publication Date: 2012/05/29

Reference Information

CVE: CVE-2012-2948

BID: 53723