Digium Asterisk up to 1.8.4.0 IAX2 Channel Driver chan_iax2.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Digium Asterisk up to 1.8.4.0. Impacted is an unknown function of the file chan_iax2.c of the component IAX2 Channel Driver. The manipulation results in input validation. This vulnerability is identified as CVE-2011-2535. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Digium Asterisk up to 1.8.4.0 (Communications System). It has been classified as problematic. Affected is an unknown function of the file chan_iax2.c of the component IAX2 Channel Driver. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

chan_iax2.c in the IAX2 channel driver in Asterisk Open Source 1.4.x before 1.4.41.1, 1.6.2.x before 1.6.2.18.1, and 1.8.x before 1.8.4.3, and Asterisk Business Edition C.3 before C.3.7.3, accesses a memory address contained in an option control frame, which allows remote attackers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a crafted frame.

The weakness was released 07/06/2011 by Paul with Asterisk (Website). The advisory is shared for download at downloads.asterisk.org. This vulnerability is traded as CVE-2011-2535 since 06/22/2011. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 55457 (Asterisk Multiple Channel Drivers Denial of Service (AST-2011-008 / AST-2011-009 / AST-2011-010)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Denial of Service. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119356 (Asterisk Multiple Denial of Service Vulnerabilities (AST-2011-008, AST-2011-009, AST-2011-010)).

Upgrading to version 1.8.4.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (68205), Tenable (55457), SecurityFocus (BID 48431†), OSVDB (73309†) and Secunia (SA44973†). Entries connected to this vulnerability are available at VDB-57878 and VDB-57875. Once again VulDB remains the best 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: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 55457
Nessus Name: Asterisk Multiple Channel Drivers Denial of Service (AST-2011-008 / AST-2011-009 / AST-2011-010)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 69982
OpenVAS Name: Debian Security Advisory DSA 2276-1 (asterisk)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Asterisk 1.8.4.1

Timelineinfo

06/22/2011 🔍
06/22/2011 +0 days 🔍
06/24/2011 +2 days 🔍
06/24/2011 +0 days 🔍
06/24/2011 +0 days 🔍
07/03/2011 +9 days 🔍
07/06/2011 +3 days 🔍
07/06/2011 +0 days 🔍
03/23/2015 +1356 days 🔍
11/14/2021 +2428 days 🔍

Sourcesinfo

Vendor: digium.com

Advisory: dsa-2276
Researcher: Paul
Organization: Asterisk
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-2535 (🔍)
GCVE (CVE): GCVE-0-2011-2535
GCVE (VulDB): GCVE-100-57876

OVAL: 🔍

X-Force: 68205
SecurityFocus: 48431 - Asterisk Multiple Remote Denial of Service Vulnerabilities
Secunia: 44973 - Asterisk IAX2 Channel Driver "iax2_setoption()" Denial of Service Vulnerability, Moderately Critical
OSVDB: 73309
SecurityTracker: 1025708 - Asterisk IAX2 Channel Driver Bug Lets Remote Users Deny Service
Vulnerability Center: 32075 - Asterisk Open Source And Asterisk Business Edition Remote DoS Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/14/2021 08:14
Changes: 03/23/2015 16:50 (67), 03/24/2017 18:42 (19), 11/14/2021 08:10 (3), 11/14/2021 08:13 (1), 11/14/2021 08:14 (1)
Complete: 🔍
Cache ID: 216:662:103

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