CVE-2020-9484 : Exploit Details and Defense Strategies
Learn about CVE-2020-9484, a remote code execution vulnerability in Apache Tomcat versions 7.0.0 to 10.0.0-M4. Find out the impact, affected systems, exploitation details, and mitigation steps.
Apache Tomcat Remote Code Execution Vulnerability
Understanding CVE-2020-9484
Apache Tomcat versions 7.0.0 to 10.0.0-M4 are affected by a remote code execution vulnerability.
What is CVE-2020-9484?
The vulnerability allows an attacker to trigger remote code execution via deserialization of a file under their control under specific conditions.
The Impact of CVE-2020-9484
- Successful exploitation can lead to remote code execution on the server.
- Attackers can control the contents and name of a file on the server to execute malicious code.
Technical Details of CVE-2020-9484
Vulnerability Description
- Attackers can exploit the PersistenceManager with a FileStore to trigger remote code execution.
Affected Systems and Versions
- Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54, 7.0.0 to 7.0.103
Exploitation Mechanism
- Attacker-controlled file on the server
- Configuration using PersistenceManager with a FileStore
- PersistenceManager configured with specific settings
- Knowledge of the file path from the storage location
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by Apache Tomcat.
- Monitor for any unusual file activities on the server.
- Restrict access to sensitive server files.
Long-Term Security Practices
- Regularly update and patch Apache Tomcat installations.
- Implement strict file access controls and monitoring mechanisms.
- Conduct regular security audits and vulnerability assessments.
Patching and Updates
- Stay informed about security updates from Apache Tomcat.
- Apply patches promptly to mitigate the risk of exploitation.