alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Oracle WebLogic JNDI Injection RCE Attempt (CVE-2021-2109)"; flow:established,to_server; http.uri; content:"/consolejndi.portal|3f|"; fast_pattern; content:"_pageLabel|3d|JNDIBindingPageGeneral"; content:"_nfpb|3d|true"; content:"JNDIBindingPortlethandle|3d|com.bea.console.handles.JndiBindingHandle"; pcre:"/^(?:\x28|\x2528)(?:\x22|\x2522|\x27|\x2527|\x2d|\x252[Dd]).*ldap(?:\x3a|\x253[aA])(?:\x2f|\x252[fF]){2}/Ri"; content:"AdminServer"; reference:url,mp.weixin.qq.com/s/wX9TMXl1KVWwB_k6EZOklw; reference:cve,2021-2109; reference:url,packetstormsecurity.com/files/161053/Oracle-WebLogic-Server-14.1.1.0-Remote-Code-Execution.html; classtype:attempted-admin; sid:2031532; rev:4; metadata:affected_product Web_Server_Applications, attack_target Web_Server, tls_state plaintext, created_at 2021_01_20, cve CVE_2021_2109, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_31, reviewed_at 2024_05_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)