Cisco TelePresence Video Communication Server X8.5.2 Registration Impersonation input validation

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.
5.4$0-$5k0.00

A vulnerability was found in Cisco TelePresence Video Communication Server X8.5.2 (Unified Communication Software). It has been declared as critical. Affected by this vulnerability is an unknown part of the component Registration. The manipulation with an unknown input leads to a input validation vulnerability (Impersonation). The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

The Mobile and Remote Access (MRA) endpoint-validation feature in Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 improperly validates the phone line used for registration, which allows remote authenticated users to conduct impersonation attacks via a crafted registration, aka Bug ID CSCuv40396.

The weakness was presented 08/20/2015 as CSCuv40396 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2015-4316 since 06/04/2015. The attack can be launched remotely. A single authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/12/2022).

The vulnerability scanner Nessus provides a plugin with the ID 85651 (Cisco TelePresence VCS Expressway Series 8.5.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (85651), SecurityFocus (BID 76353†) and Vulnerability Center (SBV-52970†).

Productinfo

Type

Vendor

Name

Version

License

Support

  • end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.4
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Impersonation
Class: Input validation / Impersonation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 85651
Nessus Name: Cisco TelePresence VCS Expressway Series 8.5.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 803167
OpenVAS Name: Cisco TelePresence Video Communication Server (VCS) Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/04/2015 🔍
08/13/2015 +70 days 🔍
08/13/2015 +0 days 🔍
08/20/2015 +7 days 🔍
08/20/2015 +0 days 🔍
08/21/2015 +1 days 🔍
09/25/2015 +35 days 🔍
06/12/2022 +2452 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCuv40396
Status: Confirmed

CVE: CVE-2015-4316 (🔍)
SecurityFocus: 76353 - Cisco TelePresence Video Communication Server Expressway Unauthorized Access Vulnerability
SecurityTracker: 1033282
Vulnerability Center: 52970 - Cisco TelePresence Video Communication Server Remote Spoofing Vulnerability due to Improper Validation, Medium

Entryinfo

Created: 08/21/2015 10:19 AM
Updated: 06/12/2022 07:40 PM
Changes: 08/21/2015 10:19 AM (56), 03/02/2018 10:13 AM (13), 06/12/2022 07:33 PM (3), 06/12/2022 07:40 PM (1)
Complete: 🔍
Cache ID: 44:7AC:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!