ET EXPLOIT Zabbix v5.4.0 - 5.4.8 SSO/SALM Auth Bypass (CVE-2022-23131) M1

Query · suricata

flow:established,to_server;
http.uri;
content:"/index_sso.php"; startswith;
http.cookie;
content:"zbx_session=";
content:"InVzZXJuYW1lX2F0dHJpYnV0ZSI6"; distance:0; fast_pattern;
pcre:"/(?:InNhbWxfZGF0YS|JzYW1sX2RhdGEi|ic2FtbF9kYXRhI)/";
Raw source ET EXPLOIT Zabbix v5.4.0 - 5.4.8 SSO/SALM Auth Bypass (CVE-2022-23131) M1 · 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 -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Zabbix v5.4.0 - 5.4.8 SSO/SALM Auth Bypass (CVE-2022-23131) M1";
    flow:established,to_server;
    http.uri;
    content:"/index_sso.php"; startswith;
    http.cookie;
    content:"zbx_session=";
    content:"InVzZXJuYW1lX2F0dHJpYnV0ZSI6"; distance:0; fast_pattern;
    pcre:"/(?:InNhbWxfZGF0YS|JzYW1sX2RhdGEi|ic2FtbF9kYXRhI)/";
    reference:url,blog.sonarsource.com/zabbix-case-study-of-unsafe-session-storage;
    reference:cve,2022-23131;
    classtype:trojan-activity;
    sid:2035371; rev:2;
    metadata:attack_target Server, created_at 2022_03_02, cve CVE_2022_23131, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_03_02, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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