Digium Asterisk 1.8.11 IAX2 Channel Driver channels/chan_sip.c handle_request_update config

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Digium Asterisk 1.8.11. This issue affects the function handle_request_update of the file channels/chan_sip.c of the component IAX2 Channel Driver. The manipulation leads to config. This vulnerability is documented as CVE-2012-2947. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Digium Asterisk 1.8.11 (Communications System). It has been rated as critical. This issue affects the function handle_request_update of the file channels/chan_sip.c of the component IAX2 Channel Driver. The manipulation with an unknown input leads to a config vulnerability. Using CWE to declare the problem leads to CWE-16. Impacted is availability. The summary by CVE is:

chan_iax2.c in the IAX2 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, when a certain mohinterpret setting is enabled, allows remote attackers to cause a denial of service (daemon crash) by placing a call on hold.

The weakness was released 05/29/2012 by mgrobecker as AST-2012-007 (Website). It is possible to read the advisory at downloads.asterisk.org. The identification of this vulnerability is CVE-2012-2947 since 05/29/2012. The attack may be initiated remotely. A simple authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592.004 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 69 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 59532 (Fedora 15 : asterisk-1.8.12.2-1.fc15 (2012-8685)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading to version 1.8.12.1 eliminates this vulnerability. The upgrade is hosted for download at downloads.asterisk.org. Applying the patch AST-2012-007 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.

The vulnerability is also documented in the databases at X-Force (75936), Tenable (59532), SecurityFocus (BID 53722†), OSVDB (82450†) and Secunia (SA49303†). packetstormsecurity.org is providing further details. Entry connected to this vulnerability is available at VDB-5472. 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: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Config
CWE: CWE-16
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 59532
Nessus Name: Fedora 15 : asterisk-1.8.12.2-1.fc15 (2012-8685)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 71471
OpenVAS Name: Debian Security Advisory DSA 2493-1 (asterisk)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Asterisk 1.8.12.1
Patch: AST-2012-007

Timelineinfo

03/21/2012 🔍
05/29/2012 +69 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 🔍
06/18/2012 +13 days 🔍
06/18/2012 +0 days 🔍
03/25/2021 +3202 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: AST-2012-007
Researcher: mgrobecker
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2947 (🔍)
GCVE (CVE): GCVE-0-2012-2947
GCVE (VulDB): GCVE-100-5471

OVAL: 🔍

X-Force: 75936
SecurityFocus: 53722 - Asterisk IAX2 Channel Driver Denial Of Service Vulnerability
Secunia: 49303 - Asterisk Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 82450
SecurityTracker: 1027102 - Asterisk IAX2 Channel Driver Invalid Pointer Lets Remote Users Deny Service
Vulnerability Center: 35350 - Certified Asterisk and Asterisk Open Source Remote Denial of Service Vulnerability, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/05/2012 12:31
Updated: 03/25/2021 09:00
Changes: 06/05/2012 12:31 (83), 04/13/2017 17:22 (14), 03/25/2021 09:00 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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