ET EXPLOIT Possible Atlassian Confluence Improper Authentication Validation Exploitation Attempt set (CVE-2023-22518)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Possible Atlassian Confluence Improper Authentication Validation Exploitation Attempt set (CVE-2023-22518)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/json/setup-restore"; fast_pattern;
    content:".action"; within:20;
    http.header;
    content:"X-Atlassian-Token|3a 20|no-check|0d|";
    http.request_body;
    content:"filename=|22|";
    pcre:"/^[^\x22]+\.zip\x22/Ri";
    content:"Upload|20|and|20|import|0d 0a|"; nocase;
    flowbits:set,ET.CVE-2023-22518.req;
    flowbits:noalert;
    reference:cve,2023-22518;
    classtype:attempted-admin;
    sid:2049096; rev:1;
    metadata:affected_product Atlassian_Confluence, attack_target Server, created_at 2023_11_06, cve CVE_2023_22518, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2023_11_06, reviewed_at 2023_11_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)