Live › vulnerability › CVE-2020-7247
Go to dashboardOpenSMTPD, the mail server shipped with OpenBSD and used in other products, has a flaw in its SMTP address parsing (smtp_mailaddr). A remote attacker who sends a crafted SMTP session can execute arbitrary commands as root.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| OpenBSD OpenSMTPD | vendor | – | – |
Unknown from the sources.
Apply the OpenSMTPD update from the vendor (OpenBSD or your distribution) per CISA's required action; exact fixed version: unknown
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.
This page as .md · .json · in your agent: get_signal("CVE-2020-7247")
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