Vulnerability · Published Jan 13, 2021 · Assigned by cisco

CVE-2021-1311Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerability

Medium 5.4

In plain English

A medium-severity security flaw in Cisco WebEx Meetings Server from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)1.3%top 29.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco WebEx Meetings Server	n/a

Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

20210113 Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerability vendor-advisory, x_refsource_CISCO