ET WEB_SPECIFIC_APPS SonicWall Pre-Auth Stack-Based Buffer Overflow (CVE-2025-40596)

Query · suricata

flow:established,to_server;
http.uri; bsize:>2059;
content:"/__api__/"; startswith;
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS SonicWall Pre-Auth Stack-Based Buffer Overflow (CVE-2025-40596) · 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 SonicWall Pre-Auth Stack-Based Buffer Overflow (CVE-2025-40596)";
    flow:established,to_server;
    http.uri; bsize:>2059;
    content:"/__api__/"; startswith;
    reference:url,labs.watchtowr.com/stack-overflows-heap-overflows-and-existential-dread-sonicwall-sma100-cve-2025-40596-cve-2025-40597-and-cve-2025-40598/;
    reference:cve,2025-40596;
    classtype:web-application-attack;
    sid:2063847; rev:1;
    metadata:affected_product SonicWall, attack_target Server, tls_state TLSDecrypt, created_at 2025_07_31, cve CVE_2025_40596, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2025_07_31, 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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