Is CVE-2021-34418 in the CISA KEV catalog?

No. CVE-2021-34418 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34418?

CVE-2021-34418 has a CVSS v3 base score of 4.0 (MEDIUM).

What is the EPSS score for CVE-2021-34418?

CVE-2021-34418 has an EPSS score of 0.61% (45th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34418?

Upgrade zoom on-premise meeting connector controller to 4.6.239.20200613 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34418

MEDIUM

4.0

CVSS v3

NVD

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

zoom on-premise meeting connector controllerNVD

Affected:< 4.6.239.20200613Fixed in:4.6.239.20200613CVE-2021-34418derived from NVD

zoom on-premise meeting connector mmrNVD

Affected:< 4.6.239.20200613Fixed in:4.6.239.20200613CVE-2021-34418derived from NVD

zoom on-premise recording connectorNVD

Affected:< 3.8.42.20200905Fixed in:3.8.42.20200905CVE-2021-34418derived from NVD

zoom on-premise virtual room connectorNVD

Affected:< 4.4.6344.20200612Fixed in:4.4.6344.20200612CVE-2021-34418derived from NVD

zoom on-premise virtual room connector load balancerNVD

Affected:< 2.5.5492.20200616Fixed in:2.5.5492.20200616CVE-2021-34418derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

0.61%probability of exploitation in 30 days

45thpercentile

Moderate risk: more likely to be exploited than 45% of all known CVEs.

References

Vendor Advisory1

explore.zoom.us

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.