ET EXPLOIT Nagios XI OS Command Injection (CVE-2021-25296)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"nagiosxi/config/monitoringwizard.php?"; fast_pattern;
content:"plugin_output_len=";
pcre:"/^[0-9]{1,10}\x3b/R";
Raw source ET EXPLOIT Nagios XI OS Command Injection (CVE-2021-25296) · 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 Nagios XI OS Command Injection (CVE-2021-25296)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"nagiosxi/config/monitoringwizard.php?"; fast_pattern;
    content:"plugin_output_len=";
    pcre:"/^[0-9]{1,10}\x3b/R";
    reference:cve,2021-25296;
    classtype:attempted-admin;
    sid:2034992; rev:1;
    metadata:attack_target Server, created_at 2022_01_27, cve CVE_2021_25296, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_01_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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