SB2025031069 - Improper validation of files in Apache Tomcat

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2025-24813)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when handling file uploads via HTTP PUT requests. A remote attacker can send a specially crafted HTTP PUT request to the server and gain access to sensitive information or even execute arbitrary code.

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 is 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 Tomcat's file based session persistence with the default storage location
• application included a library that may be leveraged in a deserialization attack

Remediation

Install update from vendor's website.

References

• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.3
• https://tomcat.apache.org/security-10.html
• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.99
• https://github.com/apache/tomcat/commit/0a668e0c27f2b7ca0cc7c6eea32253b9b5ecb29c
• https://github.com/apache/tomcat/commit/f6c01d6577cf9a1e06792be47e623d36acc3b5dc
• https://github.com/apache/tomcat/commit/eb61aade8f8daccaecabf07d428b877975622f72
• https://lists.apache.org/thread/xl35tnb4979lnk7stnvx9sll1hb68kvf