Is CVE-2021-34599 in the CISA KEV catalog?

No. CVE-2021-34599 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34599?

CVE-2021-34599 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2021-34599?

CVE-2021-34599 has an EPSS score of 0.46% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34599?

Upgrade git to 1.1.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-34599

HIGH

7.4

CVSS v3

NVD

Description

Affected versions of CODESYS Git in Versions prior to V1.1.0.0 lack certificate validation in HTTPS handshakes. CODESYS Git does not implement certificate validation by default, so it does not verify that the server provides a valid and trusted HTTPS certificate. Since the certificate of the server to which the connection is made is not properly verified, the server connection is vulnerable to a man-in-the-middle attack.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

gitNVD

Affected:< 1.1.0.0Fixed in:1.1.0.0CVE-2021-34599derived 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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.46%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory1

customers.codesys.com

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

Embed a live status badge for CVE-2021-34599

Markdown

[![CVE-2021-34599](https://tridentstack.com/cve/badge/CVE-2021-34599.svg)](https://tridentstack.com/cve/CVE-2021-34599)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-34599"><img src="https://tridentstack.com/cve/badge/CVE-2021-34599.svg" alt="CVE-2021-34599"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.