Vulnerability Details
- CVE: CVE-2019-0232
- CVSS: 9.8 (Critical)
- Impact: Remote attackers execute OS commands via:
Tomcat CGI Servlet with enableCmdLineArguments=true
Affected Versions
| Branch | Vulnerable Range | Fixed Version |
|--------------|------------------------|---------------|
| Tomcat 9.x | 9.0.0.M1 to 9.0.17 | 9.0.18+ |
| Tomcat 8.5.x | 8.5.0 to 8.5.39 | 8.5.40+ |
| Tomcat 7.x | 7.0.0 to 7.0.93 | 7.0.94+ |
Technical Analysis
Exploits Windows command injection through:
- Malicious CGI arguments
- Poor input sanitization in
org.apache.catalina.servlets.CGIServlet
Proof of Concept
Two independent exploits available:
Mitigation Steps
Patching:
wget https://archive.apache.org/dist/tomcat/tomcat-9/v9.0.18/bin/apache-tomcat-9.0.18.tar.gz
Configuration:
- Set
enableCmdLineArguments=false in conf/web.xml
- Remove CGI servlet mapping if unused
Detection:
grep -r "enableCmdLineArguments=true" conf/
Discussion Points
- Effective WAF rules for CGI attacks?
- Tomcat hardening best practices?
- Linux vs Windows exploitability differences?
#ServerSecurity #Java #CVEPatching
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