CVE-2021-1311 Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerability
An authenticated attacker can brute force the host key to take over the host role in a Cisco Webex meeting.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1311?
CVE-2021-1311 is a medium-severity authentication bypass vulnerability in Cisco Webex Meetings, published on 13 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-307
Which versions are affected by CVE-2021-1311?
It affects 2 products.
Products include Cisco Webex Meetings, Cisco Webex Meetings Server.
How do I fix CVE-2021-1311?
No fix has been published for CVE-2021-1311 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-1311 being exploited?
There is no known exploitation of CVE-2021-1311 in the wild and no public exploit code.
Other vulnerabilities in Cisco Webex Meetings
- CVE-2017-12368 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12369 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12370 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12371 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
- CVE-2017-12372 Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players
Sources
Also known as GHSA-g93r-rwcj-f35x.