CVE-2021-1311

Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerability

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the reclaim host role feature of Cisco Webex Meetings and Cisco Webex Meetings Server could allow an authenticated, remote attacker to take over the host role during a meeting. This vulnerability is due to a lack of protection against brute forcing of the host key. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Webex Meetings Server site. A successful exploit would require the attacker to have access to join a Webex meeting, including applicable meeting join links and passwords. A successful exploit could allow the attacker to acquire or take over the host role for a meeting.

Una vulnerabilidad en la funcionalidad reclaim host role de host de Cisco Webex Meetings y Cisco Webex Meetings Server, podría permitir a un atacante remoto autenticado se haga cargo de la función de host durante una reunión. Esta vulnerabilidad se debe a la falta de protección contra la fuerza bruta de la clave del host. Un atacante podría explotar esta vulnerabilidad enviando solicitudes diseñadas a un sitio vulnerable de Cisco Webex Meetings o Webex Meetings Server. Una explotación con éxito requeriría que el atacante tuviera acceso para unirse a una reunión de Webex, incluidos los vínculos y las contraseñas correspondientes para unirse a la reunión. Una explotación con éxito podría permitir al atacante adquirir o asumir el rol de anfitrión de una reunión.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-01-13 CVE Published
2023-03-08 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-307: Improper Restriction of Excessive Authentication Attempts

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-brutef-hostkey-FWRMxVF	2024-04-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Webex Meetings Search vendor "Cisco" for product "Webex Meetings"				< 40.12.0 Search vendor "Cisco" for product "Webex Meetings" and version " < 40.12.0"		-		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				< 3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version " < 3.0"		-		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "3.0"		-		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "3.0"		maintenance_release1		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "3.0"		maintenance_release2		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "3.0"		maintenance_release3		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				3.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "3.0"		maintenance_release4		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				4.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "4.0"		-		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				4.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "4.0"		maintenance_release1		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				4.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "4.0"		maintenance_release2		Affected
Cisco Search vendor "Cisco"		Webex Meetings Server Search vendor "Cisco" for product "Webex Meetings Server"				4.0 Search vendor "Cisco" for product "Webex Meetings Server" and version "4.0"		maintenance_release3		Affected