ET EXPLOIT Apache HTTP Server - Path Traversal Attempt (CVE-2021-42013) M1

Query · suricata

flow:established,to_server;
content:"/.%%32%65/"; fast_pattern;
http.uri;
pcre:"/^\/(?:icons|cgi-bin)/";
http.uri.raw;
content:"/.%%32%65/";
target:dest_ip;
Raw source ET EXPLOIT Apache HTTP Server - Path Traversal Attempt (CVE-2021-42013) M1 · Suricata
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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 Apache HTTP Server - Path Traversal Attempt (CVE-2021-42013) M1";
    flow:established,to_server;
    content:"/.%%32%65/"; fast_pattern;
    http.uri;
    pcre:"/^\/(?:icons|cgi-bin)/";
    http.uri.raw;
    content:"/.%%32%65/";
    reference:cve,2021-42013;
    classtype:attempted-admin;
    sid:2034172; rev:2;
    metadata:created_at 2021_10_09, cve CVE_2021_42013, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_12, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1083, mitre_technique_name File_And_Directory_Discovery;
    target:dest_ip;
)

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