ET WEB_SPECIFIC_APPS Totolink cstecgi.cgi langType Parameter Buffer Overflow Attempt

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri; bsize:20;
content:"/cgi-bin/cstecgi.cgi";
http.request_body;
content:"|22|topicurl|22 3a|";
content:"|22|setLanguageCfg|22|"; within:30; fast_pattern;
content:"|22|langType|22 3a|";
pcre:"/^(?:\x20\x22|\x22)^[^\x22\x7d$]{100,}(?:\x22|\x7d|$)/R";
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Totolink cstecgi.cgi langType Parameter Buffer Overflow Attempt · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Totolink cstecgi.cgi langType Parameter Buffer Overflow Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:20;
    content:"/cgi-bin/cstecgi.cgi";
    http.request_body;
    content:"|22|topicurl|22 3a|";
    content:"|22|setLanguageCfg|22|"; within:30; fast_pattern;
    content:"|22|langType|22 3a|";
    pcre:"/^(?:\x20\x22|\x22)^[^\x22\x7d$]{100,}(?:\x22|\x7d|$)/R";
    reference:url,kn0sinna.notion.site/TOTOLINK-EX1200T-stack-based-BufferOverflow-vulnerability-204b1876cd6e80709ce8dab4778dce55;
    classtype:web-application-attack;
    sid:2062746; rev:1;
    metadata:affected_product TOTOLINK, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_06_04, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_06_04, 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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