CVE-2021-33037 is a medium-severity request smuggling vulnerability affecting Apache Tomcat versions 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46, and 8.5.0 to 8.5.66, as well as products like Debian, McAfee, and Oracle that incorporate these Tomcat versions. The vulnerability arises from incorrect parsing of the HTTP transfer-encoding header, particularly when used with a reverse proxy, allowing for potential request smuggling attacks. With a CVSS score of 5.3, it has a low attack complexity and requires no user interaction, but its impact is limited to integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating a low current threat level.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 8.5.0, <= 8.5.66CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | ||
> 9.0.0, <= 9.0.46CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | ||
> 10.0.0, <= 10.0.6CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | ||
8.0.6CPE matchmatch criteria | cpe:2.3:a:apache:tomee:8.0.6:*:*:*:*:*:*:* | ||
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:N/UI:N/S:U/C:N/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.