jndi-injection

Testing for JNDI injection involves detecting if untrusted input reaches InitialContext.lookup to trigger outbound connections. You must select safe confirmation payloads and map feasible RMI, LDAP, or DNS vectors to verify exploitability in the Java target.

Log4Shell exploitation works by injecting JNDI lookup payloads into logged paths, triggering the JNDI evaluation. Testers use detection-only DNS confirmation and WAF bypass variants to validate whether logging successfully triggers the outbound JNDI connection.

You can bypass post-8u191 JDK constraints by shifting to LDAP-based serialized-gadget or BeanFactory and EL abuse paths. This approach infers version-appropriate bypass strategies to achieve remote code execution where direct remote class loading is restricted.

The best way to confirm a JNDI injection vulnerability safely is by using dedicated DNS confirmation steps. This detection-only approach verifies the sink evaluation by mapping outbound DNS connections without executing malicious payloads or remote class loading.

You need marshalsec and ysoserial to provide dedicated tooling guidance for Java JNDI security testing. These tools help generate the required LDAP serialized gadgets and payloads to infer version-appropriate bypass paths and confirm remote code execution.