CVE-2025-24813

Path Equivalence: file.Name (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.2, from 10.1.0-M1 through 10.1.34, from 9.0.0.M1 through 9.0.98.

If all of the following were true, a malicious user was able to view security sensitive files and/or inject content into those files: - writes enabled for the default servlet (disabled by default)

• support for partial PUT (enabled by default)
• a target URL for security sensitive uploads that was a sub-directory of a target URL for public uploads - attacker knowledge of the names of security sensitive files being uploaded - the security sensitive files also being uploaded via partial PUT

If all of the following were true, a malicious user was able to perform remote code execution:

• writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - application was using Tomcats file based session persistence with the default storage location - application included a library that may be leveraged in a deserialization attack

Users are recommended to upgrade to version 11.0.3, 10.1.35 or 9.0.99, which fixes the issue.

Weakness

The product accepts path input in the form of internal dot (‘file.ordir’) without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.

Affected Software

References

• https://lists.apache.org/thread/j5fkjv2k477os90nczf2v9l61fb0kkgq
• http://www.openwall.com/lists/oss-security/2025/03/10/5
• https://security.netapp.com/advisory/ntap-20250321-0001/
• https://www.vicarius.io/vsociety/posts/cve-2025-24813-detect-apache-tomcat-rce
• https://www.vicarius.io/vsociety/posts/cve-2025-24813-mitigate-apache-tomcat-rce
• https://github.com/absholi7ly/POC-CVE-2025-24813/blob/main/README.md