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You Should Know:
The vulnerability CVE-2025-24813 in Apache Tomcat allows remote code execution under specific conditions. This exploit involves a two-step process:
1. Step 1: HTTP PUT Request
- Send a malicious session file to the vulnerable server using an HTTP PUT request.
- Example command using
curl:curl -X PUT -d @malicious_session_file http://vulnerable-server.com/path/to/tomcat
- This step uploads the malicious file to the server.
- Step 2: HTTP GET Request with Customized Cookie
– Trigger the deserialization of the malicious session file using an HTTP GET request with a specially crafted cookie.
– Example command:
curl -X GET -H "Cookie: JSESSIONID=malicious_cookie_value" http://vulnerable-server.com/path/to/tomcat
– This step executes the malicious code on the server.
Practice Verified Commands and Steps:
- Check Tomcat Version:
To verify if your server is running a vulnerable version of Tomcat:catalina.sh version
If the version is outdated, update immediately.
- Check Java Version:
Ensure Java is up to date:
java -version
- File Permissions in `/tmp` Directory:
Verify file permissions in the `/tmp` directory to ensure no unauthorized files are present:ls -la /tmp
-
Wireshark Analysis:
Use Wireshark to analyze HTTP traffic and detect malicious PUT/GET requests:wireshark -k -i eth0 -Y "http.request.method == PUT || http.request.method == GET"
-
Mitigation Steps:
- Update Apache Tomcat to the latest version.
- Regularly monitor and clean the `/tmp` directory.
- Implement a Web Application Firewall (WAF) to filter malicious requests.
What Undercode Say:
CVE-2025-24813 highlights the critical importance of keeping software up to date. Exploits like this can lead to severe consequences, including remote code execution and unauthorized file writes. Regularly updating your systems, monitoring file permissions, and using tools like Wireshark for traffic analysis are essential practices. Cyber insurance providers may deny claims if systems are found to be outdated, emphasizing the need for proactive security measures. Stay vigilant and ensure your servers are patched and secure.
Additional Resources:
References:
Reported By: Unit42 We – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
