Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82 and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Users are recommended to upgrade to version 11.0.0-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.
The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.
| Link | Tags |
|---|---|
| https://lists.apache.org/thread/0rqq6ktozqc42ro8hhxdmmdjm1k1tpxr | vendor advisory mailing list |
| https://www.openwall.com/lists/oss-security/2023/11/28/2 | third party advisory mailing list |
| https://security.netapp.com/advisory/ntap-20231214-0009/ | |
| https://lists.debian.org/debian-lts-announce/2024/01/msg00001.html |