ET WEB_SPECIFIC_APPS Citrix Netscaler ADC & Gateway Memory Leak CitrixBleed2 (CVE-2025-5777)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/p/u/doAuthentication.do"; fast_pattern; startswith;
http.request_body;
content:"login";
content:!"|3d|"; within:1;
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Citrix Netscaler ADC & Gateway Memory Leak CitrixBleed2 (CVE-2025-5777) · 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 any (
    msg:"ET WEB_SPECIFIC_APPS Citrix Netscaler ADC & Gateway Memory Leak CitrixBleed2 (CVE-2025-5777)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/p/u/doAuthentication.do"; fast_pattern; startswith;
    http.request_body;
    content:"login";
    content:!"|3d|"; within:1;
    reference:url,labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/;
    reference:cve,2025-5777;
    classtype:web-application-attack;
    sid:2063315; rev:1;
    metadata:affected_product Citrix, attack_target Server, created_at 2025_07_07, cve CVE_2025_5777, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_07_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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