Rule Category

SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.

Alert Message

SERVER-WEBAPP Apache Struts OGNL expression injection attempt

Rule Explanation

This event is generated when an OGNL injection attempt is detected. Impact: Possible remote code execution Details: This vulnerability exists when a web server passes raw user input to an a method that interprets the input as an OGNL expression. This rule detects OGNL injection attempts that try to execute system commands using the Java runtime by searching for "getRuntime" followed by "exec" in any requests to an Apache Struts action page. Ease of Attack: Medium, publicly available exploits for a number of vulnerable web applications.

What To Look For

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework



For reference, see the MITRE ATT&CK vulnerability types here:


Additional Links

Rule Vulnerability

CVE Additional Information

The Struts 1 plugin in Apache Struts 2.3.x might allow remote code execution via a malicious field value passed in a raw message to the ActionMessage.
Severity Base Score9.8
Impact Score5.9 Exploit Score3.9
Confidentiality ImpactHIGH Integrity ImpactHIGH
Availability ImpactHIGH Access Vector
Authentication Ease of Access