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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Apache Tomcat CGI Servlet allows OS command injection. <br>π₯ **Consequences**: Remote attackers can execute arbitrary code on the server. Itβs a critical RCE (Remote Code Execution) flaw.
Q2Root Cause? (CWE/Flaw)
π‘οΈ **Root Cause**: Improper handling of CGI arguments. <br>π **Flaw**: The CGI Servlet passes user input directly to the OS shell without proper sanitization.β¦
π **Attacker Capabilities**: <br>β’ Execute system commands. <br>β’ Gain full control of the underlying OS. <br>β’ Access sensitive data, install backdoors, or pivot to other systems.β¦
β οΈ **Exploitation Threshold**: <br>β’ **Auth**: No authentication required for the exploit itself. <br>β’ **Config**: **CRITICAL PREREQUISITE**: The CGI Servlet must be explicitly enabled in `web.xml`.β¦
π **Self-Check Steps**: <br>1. Check Tomcat version against the affected list. <br>2. Inspect `conf/web.xml` for `<servlet-name>cgi</servlet-name>`. <br>3. Look for `cgiPathPrefix` configuration. <br>4.β¦
π₯ **Urgency**: HIGH. <br>β’ RCE vulnerabilities are top priority. <br>β’ Exploits are public and easy to use. <br>β’ Many legacy systems still run older Tomcat versions.β¦