CVE-2021-33620 is a denial-of-service vulnerability affecting Squid versions before 4.15 and 5.x before 5.0.6, where a remote server can disrupt Squid's availability to all clients through a malformed HTTP response header. Rated Medium with a CVSS score of 6.5, this vulnerability has a network attack vector, low attack complexity, and high impact on availability, requiring low privileges and no user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low current threat level.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.15CPE matchmatch criteria | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* | ||
>= 5.0, < 5.0.6CPE matchmatch criteria | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.