CVE-2023-45648
Apache Tomcat: Trailer header parsing too lenient
Description
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0 through 11.0.0, from 10.1.0 through 10.1.13, from 9.0.0 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 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.
How to fix CVE-2023-45648
To remediate CVE-2023-45648, upgrade the affected package to a fixed version below.
- —upgrade to 8.5.94 or later
- —upgrade to 10.1.6-1+deb12u1 or later
- —upgrade to 9.0.43-2~deb11u7 or later
- —upgrade to 11.0.0-M12 or later
- —upgrade to 11.0.0-M12 or later
- —upgrade to 11.0.0-M12 or later
Is CVE-2023-45648 being exploited?
Moderate — EPSS is 5.8%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (6)
- >= 8.5.0, < 8.5.94, >= 9.0.1, < 9.0.81, >= 10.1.1, < 10.1.14
- from 0, < 10.1.6-1+deb12u1
- from 0, < 9.0.43-2~deb11u7
- >= 11.0.0-M1, < 11.0.0-M12
- >= 11.0.0-M1, < 11.0.0-M12
- >= 11.0.0-M1, < 11.0.0-M12
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |