Rule History

SID: 2034362 • Source: et/open

Versions (6)

Version DetailsCurrent

Rev: 1 • Nov 9, 2021, 12:00 PM

Message:

ET EXPLOIT ManageEngine AdSelfService Plus - Authentication Bypass Attempt (CVE-2021-40539)

Rule:

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT ManageEngine AdSelfService Plus - Authentication Bypass Attempt (CVE-2021-40539)"; flow:established,to_server; http.uri; content:"/./RestAPI/"; startswith; fast_pattern; reference:url,www.synacktiv.com/publications/how-to-exploit-cve-2021-40539-on-manageengine-adselfservice-plus.html; reference:cve,2021-40539; classtype:attempted-admin; sid:2034362; rev:1; metadata:created_at 2021_11_09, cve CVE_2021_40539, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

Created:

Nov 9, 2021, 12:00 PM

Updated:

Nov 9, 2021, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 8, 2025, 9:34 PM

Filename:

rules/emerging-exploit.rules