alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Jenkins Chained Exploits CVE-2018-1000861 and CVE-2019-1003000 M3"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/securityRealm/user/"; fast_pattern; content:"/descriptorByName/"; distance:0; content:"checkScript|3f|"; content:"value|3d|"; pcre:"/^[^\x0d\x26]*?[\x40\x7b\x28]/R"; reference:cve,2018-100086; reference:url,blog.orange.tw/2019/01/hacking-jenkins-part-1-play-with-dynamic-routing.html; reference:url,blog.orange.tw/2019/02/abusing-meta-programming-for-unauthenticated-rce.html; reference:cve,2019-100300; classtype:web-application-attack; sid:2060509; rev:2; metadata:affected_product Jenkins, attack_target Server, created_at 2025_03_03, cve CVE_2018_100086_CVE_2019_100300, deployment Perimeter, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_04_11, reviewed_at 2025_08_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)