CVE-2023-45648
Apache Tomcat Improper Input Validation vulnerability
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.
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?
Likely — EPSS is 62.1%, placing CVE-2023-45648 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
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 |