Improper Restriction of Excessive Authentication Attempts in Cisco Webex Meetings and Cisco Webex Meetings Server
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-1311 |
| CWE-ID | CWE-307 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco Webex Meetings Server applications / Conferencing, Collaboration and VoIP solutions Cisco WebEx Meetings Server Server applications / Conferencing, Collaboration and VoIP solutions |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper Restriction of Excessive Authentication Attempts
EUVDB-ID: #VU49574
Risk: Medium
CVSSv4.0: 1.3 [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/E:U/U:Green]
CVE-ID: CVE-2021-1311
CWE-ID:
CWE-307 - Improper Restriction of Excessive Authentication Attempts
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Webex Meetings: 40.10.1
Cisco WebEx Meetings Server: - - 4.0MR3 Patch 4
CPE2.3- cpe:2.3:a:cisco_systems:cisco_webex_meetings:40.10.1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:3.0MR3 Patch 5:*:*:*:*:*:*:*
- cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:4.0MR3 Patch 4:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
