ET WEB_SERVER WebResource.axd access without t (time) parameter - possible ASP padding-oracle exploit

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/WebResource.axd"; nocase;
content:!"&t="; nocase;
content:!"&amp|3b|t="; nocase;
detection_filter:track by_src,count 15,seconds 2;
Raw source ET WEB_SERVER WebResource.axd access without t (time) parameter - possible ASP padding-oracle exploit · Suricata
Esc
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 -> $HOME_NET any (
    msg:"ET WEB_SERVER WebResource.axd access without t (time) parameter - possible ASP padding-oracle exploit";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/WebResource.axd"; nocase;
    content:!"&t="; nocase;
    content:!"&amp|3b|t="; nocase;
    detection_filter:track by_src,count 15,seconds 2;
    reference:url,netifera.com/research/;
    reference:url,www.microsoft.com/technet/security/advisory/2416728.mspx;
    classtype:web-application-attack;
    sid:2011807; rev:7;
    metadata:created_at 2010_10_13, signature_severity Informational, updated_at 2020_04_22;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.