CVE-2020-3542 Cisco Webex Training Unauthorized Meeting Join Vulnerability
Authenticated attackers can bypass meeting password protection to join private sessions via API manipulation, requiring Cisco Webex Training users to apply vendor patches.
- 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-2020-3542?
CVE-2020-3542 is a medium-severity authentication bypass vulnerability in Cisco Webex Meetings, published on 4 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in Cisco Webex Training could allow an authenticated, remote attacker to join a password-protected meeting without providing the meeting password. The vulnerability is due to improper validation of input to API requests that are a part of meeting join flow. An attacker could exploit this vulnerability by sending an API request to the application, which would return a URL that includes a meeting join page that is prepopulated with the meeting username and password. A successful exploit could allow the attacker to join the password-protected meeting. The attacker would be visible in the attendee list of the meeting.
Weakness: CWE-20
Which versions are affected by CVE-2020-3542?
It affects 1 product.
Products include Cisco Webex Training.
How do I fix CVE-2020-3542?
No fix has been published for CVE-2020-3542 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-2020-3542 being exploited?
There is no known exploitation of CVE-2020-3542 in the wild and no public exploit code.
Sources
Also known as GHSA-f5m9-r5hc-4gww.