Digium Asterisk up to 1.6.2.0 Channel Driver chan_sip.c memory corruption

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 critical has been found in Digium Asterisk up to 1.6.2.0. This issue affects some unknown processing of the file chan_sip.c of the component Channel Driver. The manipulation leads to memory corruption. This vulnerability is referenced as CVE-2011-2529. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Digium Asterisk up to 1.6.2.0 (Communications System) and classified as critical. This issue affects some unknown processing of the file chan_sip.c of the component Channel Driver. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle \0 characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.

The weakness was published 07/06/2011 by Paul with Asterisk (Website). It is possible to read the advisory at downloads.asterisk.org. The identification of this vulnerability is CVE-2011-2529 since 06/16/2011. 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 of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 55430 (FreeBSD : Asterisk -- multiple vulnerabilities (40544e8c-9f7b-11e0-9bec-6c626dd55a41)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. 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 1.6.2.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (68203), Tenable (55430), SecurityFocus (BID 48431†), OSVDB (73307†) and Secunia (SA45048†). Similar entries are available at VDB-57878 and VDB-57876. Statistical analysis made it clear that VulDB provides the best quality 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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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 55430
Nessus Name: FreeBSD : Asterisk -- multiple vulnerabilities (40544e8c-9f7b-11e0-9bec-6c626dd55a41)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

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 1.6.2.1

Timelineinfo

06/16/2011 🔍
06/22/2011 +6 days 🔍
06/24/2011 +2 days 🔍
06/24/2011 +0 days 🔍
06/24/2011 +0 days 🔍
06/27/2011 +3 days 🔍
07/03/2011 +6 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-2011-2529 (🔍)
GCVE (CVE): GCVE-0-2011-2529
GCVE (VulDB): GCVE-100-57875

OVAL: 🔍

X-Force: 68203
SecurityFocus: 48431 - Asterisk Multiple Remote Denial of Service Vulnerabilities
Secunia: 45048 - Asterisk Multiple Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 73307
SecurityTracker: 1025706 - Asterisk SIP Channel Driver Null Character Bug Lets Remote Users Deny Service
Vulnerability Center: 32074 - Asterisk Open Source Remote DoS Vulnerability via Crafted SIP Packet, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/14/2021 08:04
Changes: 03/23/2015 16:50 (69), 03/24/2017 18:42 (19), 11/14/2021 07:53 (3), 11/14/2021 07:59 (1), 11/14/2021 08:04 (1)
Complete: 🔍
Cache ID: 216:645:103

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