ET WEB_SERVER Microsoft Windows Server Update Services (WSUS) Elevation of Privilege via Insecure Deserialization (CVE-2023-35317)

Query · suricata

flow:established,to_server;
http.uri;
content:"/ClientWebService/Client.asmx"; fast_pattern; startswith;
http.header;
content:"ClientWebService/GetCookie";
http.request_body;
content:"SimpleTargeting";
content:"CookieData";
http.method;
content:"POST";
target:dest_ip;
Raw source ET WEB_SERVER Microsoft Windows Server Update Services (WSUS) Elevation of Privilege via Insecure Deserialization (CVE-2023-35317) · 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_SERVER Microsoft Windows Server Update Services (WSUS) Elevation of Privilege via Insecure Deserialization (CVE-2023-35317)";
    flow:established,to_server;
    http.uri;
    content:"/ClientWebService/Client.asmx"; fast_pattern; startswith;
    http.header;
    content:"ClientWebService/GetCookie";
    http.request_body;
    content:"SimpleTargeting";
    content:"CookieData";
    http.method;
    content:"POST";
    reference:url,hawktrace.com/blog/CVE-2025-59287;
    reference:cve,2023-35317;
    classtype:web-application-attack;
    sid:2065402; rev:1;
    metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_10_27, cve CVE_2023_35317, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_27, 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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