Apache Tomcat request smuggling via malformed content-length
CVE-2022-42252

7.5HIGH

Key Information:

Vendor
Apache
Status
Apache Tomcat
Vendor
CVE Published:
1 November 2022

Summary

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.

Affected Version(s)

Apache Tomcat 10.1.0-M1 <= 10.1.0

Apache Tomcat 10.0.0-M1 <= 10.0.26

Apache Tomcat 9.0.0-M1 <= 9.0.67

References

https://lists.apache.org/thread/zzcxzvqfdqn515zfs3dxb7n8g...
https://security.gentoo.org/glsa/202305-37

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks to Sam Shahsavar who discovered this issue and reported it to the Apache Tomcat security team.
.