ET EXPLOIT Possible Apache log4j Uncontrolled Recursion Lookup (CVE-2021-45105)

Query · suricata

flow:established,to_server;
stream_size:client,<,10000;
content:"|24 7b 24 7b 3a 3a 2d 24 7b 3a 3a 2d 24 24 7b 3a 3a 2d|"; fast_pattern;
content:"|7d 7d 7d 7d|"; distance:0; within:6;
Raw source ET EXPLOIT Possible Apache log4j Uncontrolled Recursion Lookup (CVE-2021-45105) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Possible Apache log4j Uncontrolled Recursion Lookup (CVE-2021-45105)";
    flow:established,to_server;
    stream_size:client,<,10000;
    content:"|24 7b 24 7b 3a 3a 2d 24 7b 3a 3a 2d 24 24 7b 3a 3a 2d|"; fast_pattern;
    content:"|7d 7d 7d 7d|"; distance:0; within:6;
    reference:cve,2021-45105;
    classtype:attempted-admin;
    sid:2034839; rev:1;
    metadata:created_at 2021_12_22, cve CVE_2021_45105, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_22, reviewed_at 2024_05_07;
)

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