ET EXPLOIT PiHole Web Interface Regex Escape Leading to RCE Inbound M1 (CVE-2021-32706)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/admin/";
http.request_body;
content:"domains=*"; fast_pattern;
pcre:"/^(?:\x3b|\x0a|\x26|\x60|\x7C|\x24|\x3e)/R";
Raw source ET EXPLOIT PiHole Web Interface Regex Escape Leading to RCE Inbound M1 (CVE-2021-32706) · 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 -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT PiHole Web Interface Regex Escape Leading to RCE Inbound M1 (CVE-2021-32706)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/admin/";
    http.request_body;
    content:"domains=*"; fast_pattern;
    pcre:"/^(?:\x3b|\x0a|\x26|\x60|\x7C|\x24|\x3e)/R";
    reference:url,www.cvedetails.com/cve/CVE-2021-32706/;
    reference:cve,2021-32706;
    classtype:attempted-admin;
    sid:2033934; rev:1;
    metadata:attack_target Server, created_at 2021_09_13, cve CVE_2021_32706, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2021_09_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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