ET EXPLOIT Possible [401TRG] GhostCat LFI Successful Exploit (CVE-2020-1938)

Query · suricata

flow:established,to_client;
http.response_body;
content:"|3c 3f|xml|20|version|3d 22|"; startswith;
content:"Licensed|20|to|20|the|20|Apache|20|Software|20|Foundation|20 28|ASF|29 20|under|20|one|20|or|20|more|0a 20 20|contributor|20|license|20|agreements|2e|";
content:"The|20|ASF|20|licenses|20|this|20|file|20|to|20|You|20|under|20|the|20|Apache|20|License|2c 20|Version";
content:"aee/web-app_"; fast_pattern;
content:"_"; distance:1; within:1;
content:"|2e|xsd|22|";
content:"|3c|display|2d|name|3e|";
content:"|3c 2f|display|2d|name|3e|";
content:"|3c|description|3e|";
flowbits:isset,ET.GhostCat;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET EXPLOIT Possible [401TRG] GhostCat LFI Successful Exploit (CVE-2020-1938) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http [$HOME_NET,$HTTP_SERVERS] 8009 -> any any (
    msg:"ET EXPLOIT Possible [401TRG] GhostCat LFI Successful Exploit (CVE-2020-1938)";
    flow:established,to_client;
    http.response_body;
    content:"|3c 3f|xml|20|version|3d 22|"; startswith;
    content:"Licensed|20|to|20|the|20|Apache|20|Software|20|Foundation|20 28|ASF|29 20|under|20|one|20|or|20|more|0a 20 20|contributor|20|license|20|agreements|2e|";
    content:"The|20|ASF|20|licenses|20|this|20|file|20|to|20|You|20|under|20|the|20|Apache|20|License|2c 20|Version";
    content:"aee/web-app_"; fast_pattern;
    content:"_"; distance:1; within:1;
    content:"|2e|xsd|22|";
    content:"|3c|display|2d|name|3e|";
    content:"|3c 2f|display|2d|name|3e|";
    content:"|3c|description|3e|";
    flowbits:isset,ET.GhostCat;
    reference:cve,2020-1938;
    reference:url,trendmicro.com/en_us/research/20/c/busting-ghostcat-an-analysis-of-the-apache-tomcat-vulnerability-cve-2020-1938-and-cnvd-2020-10487.html;
    classtype:attempted-admin;
    sid:2046149; rev:2;
    metadata:affected_product Apache_Tomcat, attack_target Web_Server, created_at 2023_06_07, cve CVE_2020_1938, deployment Perimeter, confidence Low, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_08, reviewed_at 2024_01_26;
)

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