Digium Asterisk up to 10.5.0 channels/chan_skinny.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Digium Asterisk up to 10.5.0. Affected by this issue is some unknown functionality of the file channels/chan_skinny.c. The manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2012-3553. The attack is possible to be carried out remotely. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Digium Asterisk up to 10.5.0 (Communications System) and classified as critical. This issue affects some unknown functionality of the file channels/chan_skinny.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

chan_skinny.c in the Skinny (aka SCCP) channel driver in Asterisk Open Source 10.x before 10.5.1 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by sending a Station Key Pad Button message and closing a connection in off-hook mode, a related issue to CVE-2012-2948.

The weakness was disclosed 06/14/2012 by Christoph Hebeisen with TELUS Security Labs Vulnerability Research Team as AST-2012-009 as not defined advisory (Website). It is possible to read the advisory at downloads.asterisk.org. The identification of this vulnerability is CVE-2012-3553 since 06/14/2012. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a private exploit are known.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 59714 (Asterisk Remote Crash Vulnerability in Skinny Channel Driver (AST-2012-009)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l.

Upgrading to version 10.5.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (76336), Tenable (59714), SecurityFocus (BID 54017†), OSVDB (83040†) and Secunia (SA49543†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 59714
Nessus Name: Asterisk Remote Crash Vulnerability in Skinny Channel Driver (AST-2012-009)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 71537
OpenVAS Name: FreeBSD Ports: asterisk10
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Asterisk 10.5.1

Timelineinfo

05/30/2012 🔍
06/14/2012 +15 days 🔍
06/14/2012 +0 days 🔍
06/14/2012 +0 days 🔍
06/14/2012 +0 days 🔍
06/14/2012 +0 days 🔍
06/15/2012 +1 days 🔍
06/16/2012 +1 days 🔍
06/19/2012 +3 days 🔍
06/22/2012 +3 days 🔍
06/26/2012 +4 days 🔍
07/09/2012 +13 days 🔍
03/25/2021 +3181 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2012-009
Researcher: Christoph Hebeisen
Organization: TELUS Security Labs Vulnerability Research Team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-3553 (🔍)
GCVE (CVE): GCVE-0-2012-3553
GCVE (VulDB): GCVE-100-5567
X-Force: 76336
SecurityFocus: 54017 - Asterisk CVE-2012-3553 SCCP Skinny Channel Driver Denial of Service Vulnerability
Secunia: 49543 - Asterisk Skinny Channel Driver Denial of Service Vulnerability, Less Critical
OSVDB: 83040
Vulnerability Center: 35493 - Asterisk Open Source 10.x before 10.5.1 Remote Denial of Service Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/22/2012 11:07
Updated: 03/25/2021 17:05
Changes: 06/22/2012 11:07 (77), 12/24/2017 09:42 (11), 03/25/2021 17:05 (3)
Complete: 🔍
Cache ID: 216::103

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