CVE-2023-45648
Apache Tomcat: Trailer header parsing too lenient
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 10, 2023
- Updated
- Oct 29, 2025
- Reserved
- Oct 10, 2023
Description
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy.
Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | CISA-ADP |
Weaknesses
- CWE-20 Improper Input Validation
Affected Products
| Product | Versions |
|---|---|
Apache TomcatApache Software Foundation |
|
References
- https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdpvendor-advisory
- http://www.openwall.com/lists/oss-security/2023/10/10/10
- https://www.debian.org/security/2023/dsa-5522
- https://www.debian.org/security/2023/dsa-5521
- https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html
- https://security.netapp.com/advisory/ntap-20231103-0007/
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