Is CVE-2021-41611 in the CISA KEV catalog?

No. CVE-2021-41611 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-41611?

CVE-2021-41611 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-41611?

CVE-2021-41611 has an EPSS score of 2.85% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-41611?

Upgrade squid on debian 12 to 5.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-41611

HIGHEPSS 85th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating an origin server or peer certificate, Squid may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust well improperly. This indication of trust may be passed along to clients, allowing access to unsafe or hijacked services.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

squidDebian

Fixed in:5.2-1CVE-2021-41611

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

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

2.85%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

squid-cache.org

Third-Party Advisory1

openwall.com

Other references1

lists.fedoraproject.org

Embed a live status badge for CVE-2021-41611

Markdown

[![CVE-2021-41611](https://tridentstack.com/cve/badge/CVE-2021-41611.svg)](https://tridentstack.com/cve/CVE-2021-41611)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-41611"><img src="https://tridentstack.com/cve/badge/CVE-2021-41611.svg" alt="CVE-2021-41611"></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.