ET WEB_SPECIFIC_APPS Xerox FreeFlow Core Arbitrary File Upload/Directory Traversal Attempt (CVE-2025-8356)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Xerox FreeFlow Core Arbitrary File Upload/Directory Traversal Attempt (CVE-2025-8356)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:1;
    content:"/";
    http.content_type;
    content:"multipart/related";
    http.request_body;
    content:"application/vnd.cip4-jmf+xml"; fast_pattern;
    content:"Content-Disposition|3a 20|attachment|3b 20|filename|3d 22|"; distance:0;
    pcre:"/^[^\x26]*?(?:(?:\x2e|%2[Ee]){1,2}(?:\x2f|\x5c|%5[Cc]|%2[Ff]){1,}){2,}/R";
    reference:url,horizon3.ai/attack-research/attack-blogs/from-support-ticket-to-zero-day/;
    reference:cve,2025-8536;
    reference:cve,2025-8356;
    classtype:attempted-admin;
    sid:2064001; rev:1;
    metadata:affected_product Xerox, attack_target Server, tls_state plaintext, created_at 2025_08_13, cve CVE_2025_8356, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)