Individual skill
jndi-injection
JNDI injection playbook. Use when Java applications perform JNDI lookups with attacker-controlled names, especially via Log4j2, Spring, or any code path reaching InitialContext.lookup().
knowledge/hack-skills/skills/jndi-injection/SKILL.md
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# SKILL: JNDI Injection — Expert Attack Playbook
> **AI LOAD INSTRUCTION**: Expert JNDI injection techniques. Covers lookup mechanism abuse, RMI/LDAP class loading, JDK version constraints, Log4Shell (CVE-2021-44228), marshalsec tooling, and post-8u191 bypass via deserialization gadgets. Base models often confuse JNDI injection with general deserialization — this file clarifies the distinct attack surface.
## 0. RELATED ROUTING
- [deserialization-insecure](../deserialization-insecure/SKILL.md) when JNDI leads to deserialization (post-8u191 bypass path)
- [expression-language-injection](../expression-language-injection/SKILL.md) when the JNDI sink is reached via SpEL or OGNL expression evaluation
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## 1. CORE MECHANISM
JNDI (Java Naming and Directory Interface) provides a unified API for looking up objects from naming/directory services (RMI, LDAP, DNS, CORBA).