Apache Tomcat request smuggling via malformed content-length
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0 to 9.0.67, 10.0.0 to 10.0.26 or 10.1.0 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
02 / AFFECTED SOFTWARE
Affected packages
182 explicit affected versions
115 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0 to 9.0.67, 10.0.0 to 10.0.26 or 10.1.0 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
05 / REFERENCES
Further evidence
- https://lists.apache.org/thread/zzcxzvqfdqn515zfs3dxb7n8gty589sq
- https://nvd.nist.gov/vuln/detail/CVE-2022-42252
- https://security.gentoo.org/glsa/202305-37
- https://github.com/apache/tomcat
- https://github.com/apache/tomcat/commit/0d089a15047faf9cb3c82f80f4d28febd4798920
- https://github.com/apache/tomcat/commit/4c7f4fd09d2cc1692112ef70b8ee23a7a037ae77
- https://github.com/apache/tomcat/commit/a1c07906d8dcaf7957e5cc97f5cdbac7d18a205a
- https://github.com/apache/tomcat/commit/c9fe754e5d17e262dfbd3eab2a03ca96ff372dc3
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-9.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/42xxx/CVE-2022-42252.json