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.
7.2	$0-$5k	0.00

A vulnerability was found in Nortel Business Communications Manager (unknown version). It has been classified as critical. Affected is an unknown code block. The manipulation with an unknown input leads to a authentication spoofing vulnerability. CWE is classifying the issue as CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. This is going to have an impact on availability. CVE summarizes:

The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile Voice Client, and other product lines, allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.

The weakness was presented 10/18/2007 with Compass Security (Website). The advisory is shared for download at support.nortel.com. This vulnerability is traded as CVE-2007-5640 since 10/23/2007. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability is also documented in the vulnerability database at X-Force (37254). See 39406 and 39405 for similar entries.

Productinfo

Vendor

• Nortel

Name

• Business Communications Manager

License

• commercial

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Authentication spoofing
CWE: CWE-290 / CWE-287
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/18/2007 🔍
10/18/2007 +0 days 🔍
10/18/2007 +0 days 🔍
10/18/2007 +0 days 🔍
10/23/2007 +4 days 🔍
10/23/2007 +0 days 🔍
03/16/2015 +2701 days 🔍
11/03/2017 +963 days 🔍

Sourcesinfo

Vendor: nortel-canada.com

Advisory: support.nortel.com
Organization: Compass Security
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-5640 (🔍)
X-Force: 37254 - Nortel IP Phone UNIStim re-register denial of service
SecurityFocus: 26124 - Nortel UNIStim IP Phone Remote Denial of Service Vulnerability
Secunia: 27234 - Nortel Products Multiple Vulnerabilities, Less Critical
OSVDB: 41772 - Nortel Multiple Products Signaling Server Spoofed Re-registration DoS

See also: 🔍

Entryinfo

Created: 03/16/2015 12:18
Updated: 11/03/2017 08:00
Changes: 03/16/2015 12:18 (53), 11/03/2017 08:00 (8)
Complete: 🔍

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