Is CVE-2022-36436 in the CISA KEV catalog?

No. CVE-2022-36436 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-36436?

CVE-2022-36436 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-36436?

CVE-2022-36436 has an EPSS score of 1.65% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-36436?

Upgrade twisted vnc authentication proxy to 1.2.0 or later.

CVE & CISA-KEV Catalog

CVE-2022-36436

CRITICALEPSS 74th pctl

9.8

CVSS v3

NVD

Description

OSU Open Source Lab VNCAuthProxy through 1.1.1 is affected by an vncap/vnc/protocol.py VNCServerAuthenticator authentication-bypass vulnerability that could allow a malicious actor to gain unauthorized access to a VNC session or to disconnect a legitimate user from a VNC session. A remote attacker with network access to the proxy server could leverage this vulnerability to connect to VNC servers protected by the proxy server without providing any authentication credentials. Exploitation of this issue requires that the proxy server is currently accepting connections for the target VNC server.

CWE-287Improper Authentication

How to fix

Remediation Available

twisted vnc authentication proxyNVD

Affected:< 1.2.0Fixed in:1.2.0CVE-2022-36436derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.65%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

Release Notes1

github.com

Product1

pypi.org

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	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.