ET WEB_SPECIFIC_APPS Juniper PTX Series On-Box Anomaly Detection Framwork Command Injection Attempt (CVE-2026-21902) M4

alert http $EXTERNAL_NET any -> $HOME_NET 8160 (
    msg:"ET WEB_SPECIFIC_APPS Juniper PTX Series On-Box Anomaly Detection Framwork Command Injection Attempt (CVE-2026-21902) M4";
    flow:established,to_server;
    http.uri; bsize:21;
    content:"/config/config/commit"; startswith; fast_pattern;
    http.content_type;
    content:"application/json"; nocase;
    http.content_len;
    byte_test:0,=,0,0,string,dec;
    reference:url,labs.watchtowr.com/sometimes-you-can-just-feel-the-security-in-the-design-junos-os-evolved-cve-2026-21902-rce/;
    reference:cve,2026-21902;
    classtype:attempted-admin;
    sid:2068000; rev:2;
    metadata:affected_product JunOS, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_03_03, cve CVE_2026_21902, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_05_15, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)