CVE-2021-33620 — Improper Input Validation in Squid

CWE-20 — Improper Input Validation7 documents7 sources
Severity
6.5MEDIUMNVD
EPSS
7.0%
top 8.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
SquidSquid-cache SquidDebian Linux+1 more
Timeline
PublishedMay 28
Latest updateMay 24

Description

Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶NVDsquid-cache/squid5.0 — 5.0.6+1
▶Debiansquid/squid< 4.13-10+3

Also affects: Debian Linux 9.0, Fedora 33, 34

Patches

Patch: www.squid-cache.org ↗Patch: www.squid-cache.org ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-56g5-gjqr-cc85: Squid before 4↗2022-05-24
▶
OSV
CVE-2021-33620: Squid before 4↗2021-05-28
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CVEList
CVE-2021-33620: Squid before 4↗2021-05-28
▶

📋Vendor Advisories

3
Ubuntu
Squid vulnerabilities↗2021-06-03
▶
Red Hat
squid: denial of service in HTTP response processing↗2021-05-10
▶
Debian
CVE-2021-33620: squid - Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial o...↗2021
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CVE-2021-33620 — Improper Input Validation in Squid | cvebase