ET EXPLOIT Cisco HyperFlex OS Command Injection M1 (CVE-2021-1497)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Cisco HyperFlex OS Command Injection M1 (CVE-2021-1497)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/auth"; startswith;
    http.request_body;
    content:"username=";
    content:"password="; nocase; fast_pattern;
    content:"%3b"; distance:0;
    pcre:"/^(?:%[a-f0-9]{2}){5,}/R";
    reference:url,swarm.ptsecurity.com/cisco-hyperflex-how-we-got-rce-through-login-form-and-other-findings/;
    reference:cve,2021-1497;
    classtype:attempted-admin;
    sid:2034043; rev:1;
    metadata:attack_target Server, created_at 2021_09_29, cve CVE_2021_1497, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_29, mitre_tactic_id TA0008, mitre_tactic_name Lateral_Movement, mitre_technique_id T1210, mitre_technique_name Exploitation_Of_Remote_Services;
)