ET EXPLOIT SonicWall SMA Authenticated Command Injection Attempt CVE-2021-20039

Query · suricata

flow:established,to_server;
http.request_line;
content:"POST /cgi-bin/viewcert HTTP/1.1"; fast_pattern;
http.request_body;
content:"cert|3d|"; nocase;
pcre:"/^[^\x0d\x0a\x26\x5c]*?\x5cn/R";
Raw source ET EXPLOIT SonicWall SMA Authenticated Command Injection Attempt CVE-2021-20039 · 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 SonicWall SMA Authenticated Command Injection Attempt CVE-2021-20039";
    flow:established,to_server;
    http.request_line;
    content:"POST /cgi-bin/viewcert HTTP/1.1"; fast_pattern;
    http.request_body;
    content:"cert|3d|"; nocase;
    pcre:"/^[^\x0d\x0a\x26\x5c]*?\x5cn/R";
    reference:cve,2021-20039;
    classtype:attempted-admin;
    sid:2034986; rev:2;
    metadata:attack_target Server, created_at 2022_01_26, cve CVE_2021_20039, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2025_04_14, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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