ET EXPLOIT NodeBB Path Traversal (CVE-2021-43788)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"nodebb|2e|org|2f 3f 5b 5b 2e 2e 2f|"; nocase; fast_pattern;
content:"|3a|";
content:"|5d 5d|"; within:50; endswith;
target:dest_ip;
Raw source ET EXPLOIT NodeBB Path Traversal (CVE-2021-43788) · 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 NodeBB Path Traversal (CVE-2021-43788)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"nodebb|2e|org|2f 3f 5b 5b 2e 2e 2f|"; nocase; fast_pattern;
    content:"|3a|";
    content:"|5d 5d|"; within:50; endswith;
    reference:url,blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot;
    reference:cve,2021-43788;
    classtype:attempted-admin;
    sid:2034590; rev:2;
    metadata:created_at 2021_12_06, cve CVE_2021_43788, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_24, 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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