CVE-2021-33620
6.5
MEDIUM
CVSS 3.1
EPSS 9.6%
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.
How to fix CVE-2021-33620
To remediate CVE-2021-33620, upgrade the affected package to a fixed version below.
- Alpine/squid—upgrade to 5.0.6-r0 or later
- —upgrade to 4.13-10 or later
Is CVE-2021-33620 being exploited?
Moderate — EPSS is 9.6%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 5.0.6-r0
- from 0, < 4.13-10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |