CVE-2025-24813 is a critical security vulnerability in Apache Tomcat caused by improper handling of path equivalence checks involving filenames with internal dots. This flaw can lead to unauthorized information disclosure, file manipulation, and even remote code execution (RCE). For more details, see the Apache Security Advisory and NVD CVE-2025-24813.
The affected versions include:
Default conditions include:
Recommended mitigation steps include:
Patching is essential to mitigate risks such as remote code execution, information disclosure, and file manipulation. Immediate upgrades to secure versions are recommended to prevent exploitation and ensure server security.
You may be impacted if your systems use Apache Tomcat and have not been updated to address this vulnerability. IONIX is actively tracking CVE-2025-24813 and has developed a full exploit simulation model to assess which customers have impacted assets. IONIX customers can view updated information on their specific assets in the threat center of the IONIX portal. For more details, visit the official blog.
You can find more information about this vulnerability on the Apache Security Advisory page and the NVD CVE-2025-24813 page.
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Apache Tomcat recently disclosed a critical security vulnerability, CVE-2025-24813, affecting several versions of its widely used servlet container. This vulnerability arises from improper handling of path equivalence checks involving filenames with internal dots (file…txt). Exploitation could result in unauthorized information disclosure, file manipulation, and even remote code execution (RCE).
In this article
Affected Apache Tomcat versions include:
Due to incorrect normalization of file paths containing internal dots, attackers could exploit this vulnerability to access or modify sensitive files, potentially causing significant damage to web applications and server security.
1. Information Disclosure and File Manipulation
Certain conditions must be met for successful exploitation:
Example malicious HTTP request:
PUT /uploads/../sensitive-dir/config...xml HTTP/1.1
Host: vulnerable-server.com
Content-Length: 1024
<malicious payload>Improper path normalization lets attackers overwrite sensitive files located outside designated upload directories.
2. Remote Code Execution (RCE)
Severe consequences arise if:
Example attack scenario:
PUT /uploads/../sessions/SESSION123...session HTTP/1.1
Host: vulnerable-server.com
Content-Length: 2048
<serialized malicious payload>This manipulation allows attackers to execute arbitrary code upon deserialization of session data.
Risks associated with CVE-2025-24813 are substantial:
Immediate remediation is essential due to the widespread use of Tomcat in enterprise environments.
Mitigate risks effectively through:
1. Patch and Upgrade Apache Tomcat
Apply official patches immediately:
Upgrade example using Ubuntu/Debian:
sudo apt update
sudo apt install –only-upgrade tomcat9
Check updated version:
tomcat9 version
2. Immediate Configuration Adjustments
If immediate upgrade isn’t feasible:
Set default servlet to read-only in web.xml:
<servlet>
<servlet-name>default</servlet-name>
<servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
<init-param>
<param-name>readonly</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
Disable partial PUT requests:
<init-param>
<param-name>allowPartialPut</param-name>
<param-value>false</param-value>
</init-param>3. Secure File Upload Directories
Regularly audit permissions and avoid placing sensitive directories within publicly writable locations.
IONIX is actively tracking CVE-2025-24813. Our security research team has developed a full exploit simulation model based on known exploits. This allows us to assess which customers have impacted assets. IONIX customers can view updated information on their specific assets in the threat center of the IONIX portal.
IONIX customers will see updated information on their specific assets in the threat center of the IONIX portal.
References
