Improper Restriction of Excessive Authentication Attempts in Cisco WebEx Meetings Server and Cisco Webex Meetings - CVE-2021-1311
Published: January 13, 2021 / Updated: January 18, 2021
Vulnerability identifier: #VU49574
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-1311
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to the system.
The vulnerability exists due to a lack of protection against brute forcing of the host key in the reclaim host role feature. A remote authenticated attacker can send specially crafted requests, launch a brute-force authentication attack and acquire or take over the host role for a meeting.
Affected software
Cisco WebEx Meetings Server
Cisco Webex Meetings
Cisco Webex Meetings
How to mitigate CVE-2021-1311
Install updates from vendor's website.
Cisco WebEx Meetings Server - addressed in versions 3.0MR3 Patch 6, 4.0MR3 Patch 5