CVE-2021-34418 Pre-auth Null pointer crash in on-premise web console
An unauthenticated attacker can crash the login service of Zoom On-Premise Connectors by sending a NULL byte during authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34418?
CVE-2021-34418 is a medium-severity vulnerability in Zoom On-Premise Meeting Connector, published on 11 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The login routine of the web console in the Zoom On-Premise Meeting Connector before version 4.6.239.20200613, Zoom On-Premise Meeting Connector MMR before version 4.6.239.20200613, Zoom On-Premise Recording Connector before version 3.8.42.20200905, Zoom On-Premise Virtual Room Connector before version 4.4.6344.20200612, and Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5492.20200616 fails to validate that a NULL byte was sent while authenticating. This could lead to a crash of the login service.
Weakness: CWE-476
Which versions are affected by CVE-2021-34418?
It affects 5 products.
Products include Zoom Zoom On-Premise Meeting Connector Controller, Zoom Zoom On-Premise Meeting Connector Mmr, Zoom Zoom On-Premise Recording Connector, Zoom Zoom On-Premise Virtual Room Connector, Zoom Zoom On-Premise Virtual Room Connector Load Balancer.
How do I fix CVE-2021-34418?
No fix has been published for CVE-2021-34418 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34418 being exploited?
There is no known exploitation of CVE-2021-34418 in the wild and no public exploit code.
Other vulnerabilities in Zoom On-Premise Meeting Connector
Sources
Also known as GHSA-9m9w-fffc-45mm.