CVE-2021-34418

11.11.2021, 23:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	4 MEDIUM	LOCAL	LOW	NONE	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Zoom	CNA	4 MEDIUM	LOCAL	LOW	NONE	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 40%

Vendor	Product	Version
zoom	zoom_on-premise_meeting_connector_controller	𝑥 < 4.6.239.20200613
zoom	zoom_on-premise_meeting_connector_mmr	𝑥 < 4.6.239.20200613
zoom	zoom_on-premise_recording_connector	𝑥 < 3.8.42.20200905
zoom	zoom_on-premise_virtual_room_connector	𝑥 < 4.4.6344.20200612
zoom	zoom_on-premise_virtual_room_connector_load_balancer	𝑥 < 2.5.5492.20200616

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-476 - NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

References

https://explore.zoom.us/en/trust/security/security-bulletin