CVE-2025-24813 PoC — Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT

Source

https://github.com/n0n-zer0/Spring-Boot-Tomcat-CVE-2025-24813

Associated Vulnerability

Title:Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT (CVE-2025-24813)
Description: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. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. 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 Tomcat's 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.

Description

POC for CVE-2025-24813 using Spring-Boot

Readme

# CVE-2025-24813: Apache 

## 1. Explanation
Tomcat is vulnerable because of two separate vulnerabilities, the first is a weakness in the DefaultServlet which allows partial puts to write a temp directory
see:
https://github.com/apache/tomcat/blob/f2a274bc00cf73670a614999561c69a391b5e35f/java/org/apache/catalina/servlets/DefaultServlet.java#L608 

The second is the FileStore class, which deserializes any .session file in the temp directory
see:
https://github.com/apache/tomcat/blob/05a72ef525e41835aaf5ce3d04122970f4aa8c21/java/org/apache/catalina/session/FileStore.java#L202 

## 2. Vulnerable Tomcat Configuration

The application uses Tomcat 10.1.24 (included in Spring-Boot 3.3.0), which is vulnerable to CVE-2025-24813, and configures it with:

- File-based session persistence using `PersistentManager` and `FileStore`
- Re-enable the defaultServlet(`server.servlet.register-default-servlet=true`)
- Read-only mode disabled for the default servlet (`readonly=false`)

## 3. Nuclei Template command
See template: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-24813.yaml 
cooldown period 60 seconds is needed since it takes a while before the Filestore handler picks up the session file and executes the payload:
`nuclei -target http://localhost:8080/ -t http/cves/2025/CVE-2025-24813.yaml -interactions-cooldown-period 60 -v`

File Snapshot


 [4.0K]  /data/pocs/8f58330dd223ac2f658c4a2a25db583aba632b73
├── [ 10K]  mvnw
├── [6.9K]  mvnw.cmd
├── [1.6K]  pom.xml
├── [1.3K]  README.md
└── [4.0K]  src
    ├── [4.0K]  main
    │   ├── [4.0K]  java
    │   │   └── [4.0K]  com
    │   │       └── [4.0K]  example
    │   │           └── [4.0K]  tomcatcve202524813
    │   │               ├── [1.1K]  ServletConfig.java
    │   │               ├── [2.0K]  TomcatConfiguration.java
    │   │               ├── [ 359]  TomcatCve202524813Application.java
    │   │               └── [ 498]  WebConfiguration.java
    │   └── [4.0K]  resources
    │       └── [ 575]  application.properties
    └── [4.0K]  test
        └── [4.0K]  java
            └── [4.0K]  com
                └── [4.0K]  example
                    └── [4.0K]  tomcatcve202524813
                        └── [ 243]  TomcatCve202524813ApplicationTests.java

12 directories, 10 files

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