ET WEB_CLIENT Potential MSXML2.FreeThreadedDOMDocument Uninitialized Memory Corruption Attempt

Query · suricata

flow:to_client,established;
content:"f6d90f12-9c73-11d3-b32e-00c04f990bb4"; nocase;
content:"definition"; nocase;
pcre:"/clsid\s*\x3a\s*\x7B?\s*f6d90f12-9c73-11d3-b32e-00c04f990bb4/si";
pcre:"/(?:\[\s*[\x22\x27]definition[\x22\x27]\s*\]|\.definition)\(/";
Raw source ET WEB_CLIENT Potential MSXML2.FreeThreadedDOMDocument Uninitialized Memory Corruption Attempt · 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 -> $HOME_NET any (
    msg:"ET WEB_CLIENT Potential MSXML2.FreeThreadedDOMDocument Uninitialized Memory Corruption Attempt";
    flow:to_client,established;
    content:"f6d90f12-9c73-11d3-b32e-00c04f990bb4"; nocase;
    content:"definition"; nocase;
    pcre:"/clsid\s*\x3a\s*\x7B?\s*f6d90f12-9c73-11d3-b32e-00c04f990bb4/si";
    pcre:"/(?:\[\s*[\x22\x27]definition[\x22\x27]\s*\]|\.definition)\(/";
    reference:cve,2012-1889;
    classtype:attempted-user;
    sid:2015557; rev:6;
    metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2012_07_10, cve CVE_2012_1889, deployment Perimeter, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;
)

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