Digium Asterisk up to 10.4.0 Channel Driver channels/chan_skinny.c schedule_delivery Client Connection Termination resource management

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Digium Asterisk. Impacted is the function schedule_delivery of the file channels/chan_skinny.c of the component Channel Driver. The manipulation as part of Client Connection Termination results in resource management. This vulnerability is reported as CVE-2012-2948. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Digium Asterisk (Communications System). Affected is the function schedule_delivery of the file channels/chan_skinny.c of the component Channel Driver. The manipulation as part of a Client Connection Termination leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

chan_skinny.c in the Skinny (aka SCCP) channel driver in Certified Asterisk 1.8.11-cert before 1.8.11-cert2 and Asterisk Open Source 1.8.x before 1.8.12.1 and 10.x before 10.4.1 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by closing a connection in off-hook mode.

The weakness was disclosed 05/29/2012 by Christoph Hebeisen with isen as AST-2012-008 (Website). The advisory is shared for download at downloads.asterisk.org. This vulnerability is traded as CVE-2012-2948 since 05/29/2012. It is possible to launch the attack remotely. The requirement for exploitation is a authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 59504 (Asterisk Remote Crash Vulnerability in Skinny Channel Driver (AST-2012-008)), 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 r.

Upgrading to version 1.8.12.1 or 10.4.1 eliminates this vulnerability. The upgrade is hosted for download at downloads.asterisk.org. Applying the patch AST-2012-008 is able to eliminate this problem. The bugfix is ready for download at downloads.asterisk.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 12804.

The vulnerability is also documented in the databases at X-Force (75937), Tenable (59504), SecurityFocus (BID 53723†), OSVDB (82451†) and Secunia (SA49303†). Further details are available at packetstormsecurity.org. The entry VDB-5471 is pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 59504
Nessus Name: Asterisk Remote Crash Vulnerability in Skinny Channel Driver (AST-2012-008)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 71471
OpenVAS Name: Debian Security Advisory DSA 2493-1 (asterisk)
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 1.8.12.1/10.4.1
Patch: AST-2012-008
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/22/2012 🔍
05/29/2012 +7 days 🔍
05/29/2012 +0 days 🔍
05/29/2012 +0 days 🔍
05/29/2012 +0 days 🔍
05/29/2012 +0 days 🔍
05/30/2012 +1 days 🔍
05/30/2012 +0 days 🔍
05/30/2012 +0 days 🔍
06/02/2012 +3 days 🔍
06/05/2012 +3 days 🔍
06/14/2012 +9 days 🔍
06/18/2012 +4 days 🔍
08/15/2024 +4441 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2012-008
Researcher: Christoph Hebeisen
Organization: isen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2948 (🔍)
GCVE (CVE): GCVE-0-2012-2948
GCVE (VulDB): GCVE-100-5472

OVAL: 🔍

X-Force: 75937 - Asterisk SCCP (Skinny) channel driver denial of service, Medium Risk
SecurityFocus: 53723 - Asterisk SCCP Skinny Channel Driver Denial Of Service Vulnerability
Secunia: 49303 - Asterisk Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 82451
SecurityTracker: 1027103 - Asterisk Null Pointer Dereference in SCCP Channel Driver Lets Remote Users Deny Service
Vulnerability Center: 35351 - Certified Asterisk and Asterisk Open Source Remote DoS Vulnerability, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/05/2012 12:33
Updated: 08/15/2024 16:37
Changes: 06/05/2012 12:33 (93), 04/13/2017 17:23 (14), 03/25/2021 09:03 (3), 08/15/2024 16:37 (15)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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