CVE-2020-7247
Known Exploited (CISA KEV)CRITICAL
9.8
CVSS Severity Score
Vulnerability Description
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.
Affected Platforms (CPE)
📦
Openbsd
Opensmtpd
= 6.6💻
Debian
Debian Linux
= 9.0💻
Debian
Debian Linux
= 10.0💻
Fedoraproject
Fedora
= 32💻
Canonical
Ubuntu Linux
= 18.04💻
Canonical