ET WEB_SERVER ASP.NET Forms Authentication Bypass

Query · suricata

flow:to_server,established;
content:"CreateUserStepContainer";
content:"UserName="; distance:0;
content:"%00"; distance:0;
pcre:"/UserName\x3d[^\x26]+\x2500/";
http.uri;
content:"/CreatingUserAccounts.aspx";
target:dest_ip;
Raw source ET WEB_SERVER ASP.NET Forms Authentication Bypass · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET WEB_SERVER ASP.NET Forms Authentication Bypass";
    flow:to_server,established;
    content:"CreateUserStepContainer";
    content:"UserName="; distance:0;
    content:"%00"; distance:0;
    pcre:"/UserName\x3d[^\x26]+\x2500/";
    http.uri;
    content:"/CreatingUserAccounts.aspx";
    reference:cve,2011-3416;
    classtype:attempted-user;
    sid:2014100; rev:5;
    metadata:created_at 2012_01_03, cve CVE_2011_3416, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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