Sign In
- Platform
- Solutions
- Modern NDR
- Resources
- Company
Platform
Modern NDR
Resources
Company
Platform
Modern NDR
Resources
Company
DETECTION OVERVIEW
Risk Factors
This vulnerability is well known and SMTP servers are often exposed to the internet. An attacker can gain control of the mail server and perform additional attacks, such as denial-of-service (DoS), permanent data loss, privilege escalation, or lateral movement attacks on the network.
Category
OpenSMTPD is an open-source mail transfer agent (MTA) that runs on Unix servers. The OpenSMTPD smtp_mailaddr() function has a vulnerability in how it validates sender and recipient mail addresses. The attacker sends a malformed SMTP message with the MAIL FROM or RCPT TO fields containing a blank domain and a malicious command instead of a valid local address. The server fills in the blank domain with a default value and passes the local address contents to the server without validation, allowing the command to run with the privileges of the daemon, which often runs as root.
Update OpenSMTPD to version 6.6.2 or later
Network analysis and visibility solutions remain underrepresented in enterprises. Find out why in this preview of a new Wave report.
ExtraHop® Named a Leader in First-Ever Gartner® Magic Quadrant™ for Network Detection and Response
Visit this resource for more information.
This analysis exposes the critical link between an organization's lack of internal visibility and the escalating cost of compromise, demanding an urgent re-evaluation of how core business assets are protected.
Learn why you need to be wary of the claims certain network detection and response providers make about their coverage against the MITRE ATT&CK framework.
Learn how NDR from RevealX helps security teams detect and investigate more adversary TTPs in the MITRE ATT&CK framework than rule-based tools.
