CVE-2021-41611 — Improper Certificate Validation in Squid

CWE-295 — Improper Certificate Validation5 documents5 sources
Severity
7.5HIGHNVD
EPSS
2.2%
top 15.69%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
SquidSquid-cache SquidFedoraproject Fedora
Timeline
PublishedOct 18

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDsquid-cache/squid5.0.6 — 5.2
▶Debiansquid/squid< 5.2-1+2

Also affects: Fedora 35

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
OSV
CVE-2021-41611: An issue was discovered in Squid 5↗2021-10-18
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CVEList
CVE-2021-41611: An issue was discovered in Squid 5↗2021-10-18
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📋Vendor Advisories

2
Red Hat
squid: improper certificate validation↗2021-09-07
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Debian
CVE-2021-41611: squid - An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating...↗2021
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CVE-2021-41611 — Improper Certificate Validation | cvebase