CVE-2021-33620
6.5
MEDIUM
CVSS 3.1
EPSS 79.6%
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
Is CVE-2021-33620 being exploited?
Likely — EPSS is 79.6%, placing CVE-2021-33620 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- >= 5.0, < 5.0.6-r0
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 |