CVE-2021-31808
6.5
MEDIUM
CVSS 3.1
EPSS 5.5%
Description
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.
How to fix CVE-2021-31808
To remediate CVE-2021-31808, upgrade the affected package to a fixed version below.
- Alpine/squid—upgrade to 4.15-r0 or later
Is CVE-2021-31808 being exploited?
Moderate — EPSS is 5.5%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- >= 5.0, < 4.15-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 |