alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2019-9621 Zimbra Collaboration - Server-Side Request Forgery"; flow:established,to_server; http.uri; content:"autodiscover"; nocase; http.request_body; content:"etc/passwd"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2019-9621; reference:url,https://www.exploit.observer/?keyword=CVE-2019-9621&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=zimbra&match=exact; sid:1010537; rev:1;)