CVE-2017-6791

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the Trust Verification Service (TVS) of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of Transport Layer Security (TLS) traffic by the affected software. An attacker could exploit this vulnerability by generating incomplete traffic streams. A successful exploit could allow the attacker to deny access to the TVS for an affected device, resulting in a DoS condition, until an administrator restarts the service. Known Affected Releases 10.0(1.10000.24) 10.5(2.10000.5) 11.0(1.10000.10) 9.1(2.10000.28). Cisco Bug IDs: CSCux21905.

Una vulnerabilidad en el servicio de verificación de confianza (TVS) en Cisco Unified Communications Manager podría permitir que un atacante remoto sin autenticar provoque una denegación de servicio (DoS) en un sistema afectado. Esta vulnerabilidad se debe a una gestión incorrecta del tráfico Transport Layer Security (TLS) por parte del software afectado. Un atacante podría explotar esta vulnerabilidad generando flujos de tráfico incompletos. Si se explota esta vulnerabilidad con éxito, el atacante podría negarle el acceso al TVS a un dispositivo afectado, lo que resultaría en una denegación de servicio hasta que el administrador reiniciase el servicio. Versiones afectadas conocidas 10.0(1.10000.24) 10.5(2.10000.5) 11.0(1.10000.10) 9.1(2.10000.28). Cisco Bug IDs: CSCux21905.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-03-09 CVE Reserved
2017-09-07 CVE Published
2023-06-23 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (4)

URL	Tag	Source
http://www.securityfocus.com/bid/100662	Third Party Advisory
http://www.securitytracker.com/id/1039286	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://quickview.cloudapps.cisco.com/quickview/bug/CSCux21905	2019-10-09
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ucm	2019-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				9.1\(2.10000.28\) Search vendor "Cisco" for product "Unified Communications Manager" and version "9.1\(2.10000.28\)"		-		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				10.0\(1.10000.24\) Search vendor "Cisco" for product "Unified Communications Manager" and version "10.0\(1.10000.24\)"		-		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				10.5\(2.10000.5\) Search vendor "Cisco" for product "Unified Communications Manager" and version "10.5\(2.10000.5\)"		-		Affected
Cisco Search vendor "Cisco"		Unified Communications Manager Search vendor "Cisco" for product "Unified Communications Manager"				11.0\(1.10000.10\) Search vendor "Cisco" for product "Unified Communications Manager" and version "11.0\(1.10000.10\)"		-		Affected