ET WEB_SERVER Possible DD-WRT Metacharacter Injection Command Execution Attempt

Query · suricata

flow:to_server,established;
http.uri;
content:"/cgi-bin/|3B|"; nocase;
pcre:"/\x2Fcgi\x2Dbin\x2F\x3B.+[a-z]/i";
Raw source ET WEB_SERVER Possible DD-WRT Metacharacter Injection Command Execution 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SERVER Possible DD-WRT Metacharacter Injection Command Execution Attempt";
    flow:to_server,established;
    http.uri;
    content:"/cgi-bin/|3B|"; nocase;
    pcre:"/\x2Fcgi\x2Dbin\x2F\x3B.+[a-z]/i";
    reference:url,isc.sans.org/diary.html?storyid=6853;
    reference:url,www.theregister.co.uk/2009/07/21/critical_ddwrt_router_vuln/;
    reference:url,www.dd-wrt.com/phpBB2/viewtopic.php?t=55173;
    reference:bid,35742;
    reference:cve,2009-2765;
    classtype:attempted-admin;
    sid:2009678; rev:9;
    metadata:created_at 2010_07_30, cve CVE_2009_2765, confidence Medium, signature_severity Major, updated_at 2020_09_10;
)

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