Rule Category

SERVER-OTHER -- Snort has detected traffic exploiting vulnerabilities in a server in the network.

Alert Message

SERVER-OTHER OpenSMTPD mta_io remote command injection attempt

Rule Explanation

This rule looks for an attempt to exploit an out of bounds read vulnerability in OpenSMPTD that can be exploited to perform command injection on both the client-side and server-side with elevated privileges in some cases.

What To Look For

This rule alerts on an attempt to exploit a privilege escalation and command injection vulnerability in OpenSMTPD.

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Privilege Escalation

Technique: Exploitation for Privilege Escalation

For reference, see the MITRE ATT&CK vulnerability types here:

Additional Links

Rule Vulnerability

CVE Additional Information