Cisco Unified Communications Manager sipSafeStrlen denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Cisco Unified Communications Manager and classified as problematic. Affected by this vulnerability is the function sipSafeStrlen. The manipulation leads to denial of service. This vulnerability is known as CVE-2009-2051. There is no exploit available. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco Unified Communications Manager (Unified Communication Software) (affected version not known). Affected is the function sipSafeStrlen. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), and 7.x before 7.1(2) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a malformed SIP INVITE message that triggers an improper call to the sipSafeStrlen function, aka Bug IDs CSCsz40392 and CSCsz43987.

The weakness was shared 08/26/2009 (Website). The advisory is available at cisco.com. This vulnerability is traded as CVE-2009-2051. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 49648 (Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities (cisco-sa-20100922-sip)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43192 (Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities (cisco-sa-20100922-sip)).

A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (52814), Tenable (49648), SecurityFocus (BID 36152†), OSVDB (57453†) and Secunia (SA36499†). The entries VDB-49677, VDB-49676, VDB-49675 and VDB-49673 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Unified Communication Software

Vendor

Cisco

Name

Unified Communications Manager

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 49648
Nessus Name: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities (cisco-sa-20100922-sip)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/12/2009 🔍
08/18/2009 +67 days 🔍
08/26/2009 +8 days 🔍
08/26/2009 +0 days 🔍
08/26/2009 +0 days 🔍
08/27/2009 +0 days 🔍
08/28/2009 +1 days 🔍
09/01/2009 +3 days 🔍
09/22/2010 +386 days 🔍
03/18/2015 +1638 days 🔍
02/04/2025 +3611 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Status: Not defined

CVE: CVE-2009-2051 (🔍)
GCVE (CVE): GCVE-0-2009-2051
GCVE (VulDB): GCVE-100-49674
X-Force: 52814
SecurityFocus: 36152 - Cisco Unified Communications Manager Multiple Denial of Service Vulnerabilities
Secunia: 36499
OSVDB: 57453 - Cisco Unified Communications Manager SIP Trunk Malformed Packet Handling Remote DoS
SecurityTracker: 1022775
Vulnerability Center: 23341 - [cisco-sa-20090826-cucm] Cisco IOS and CUCM Remote DoS Vulnerability via a Malformed SIP INVITE, Medium

See also: 🔍

Entryinfo

Created: 03/18/2015 03:15 PM
Updated: 02/04/2025 10:04 PM
Changes: 03/18/2015 03:15 PM (61), 02/13/2017 10:34 AM (8), 08/20/2021 02:43 PM (3), 08/20/2021 02:46 PM (1), 07/27/2024 04:00 PM (16), 02/04/2025 10:04 PM (1)
Complete: 🔍
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