Is CVE-2021-44273 in the CISA KEV catalog?

No. CVE-2021-44273 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-44273?

CVE-2021-44273 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2021-44273?

CVE-2021-44273 has an EPSS score of 0.96% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-44273?

Upgrade e2guardian on debian 11 to 5.3.4-1+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2021-44273

HIGH

7.4

CVSS v3

NVD

Description

e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

e2guardianDebian

Fixed in:5.3.4-1+deb11u1CVE-2021-44273

Fixed in:5.3.5-3CVE-2021-44273

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

0.96%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Patch2

Third-Party Advisory1

openwall.com

Other references1

lists.debian.org

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-2021-44273

Markdown

[![CVE-2021-44273](https://tridentstack.com/cve/badge/CVE-2021-44273.svg)](https://tridentstack.com/cve/CVE-2021-44273)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-44273"><img src="https://tridentstack.com/cve/badge/CVE-2021-44273.svg" alt="CVE-2021-44273"></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.