Medium severity · published Nov 11, 2021
CVE-2021-34418
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…
5.3
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZO
Zoom On-premise Meeting Connector Controller · Zoom
before 4.6.239.20200613 · source: NVD
ZO
Zoom On-premise Meeting Connector Mmr · Zoom
before 4.6.239.20200613 · source: NVD
ZO
Zoom On-premise Recording Connector · Zoom
before 3.8.42.20200905 · source: NVD
ZO
Zoom On-premise Virtual Room Connector · Zoom
before 4.4.6344.20200612 · source: NVD
ZO
Zoom On-premise Virtual Room Connector Load Balancer · Zoom
before 2.5.5492.20200616 · source: NVD
Affected product
ZO
Zoom On-premise Meeting Connector Controller
Zoom
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34418
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34418
Vendor Advisory
https://explore.zoom.us/en/trust/security/security-bulletin
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