QwikSec

Security Database

CVE

CWE

Training

CVE-2020-7247

Published: Jan 29, 2020

Modified: Oct 21, 2025

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://www.openbsd.org/security.html

x_refsource_CONFIRM

http://www.openwall.com/lists/oss-security/2020/01/28/3

x_refsource_MISC

https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45

x_refsource_CONFIRM

http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html

x_refsource_MISC

20200129 [SECURITY] [DSA 4611-1] opensmtpd security update

mailing-list

x_refsource_BUGTRAQ

vendor-advisory

x_refsource_DEBIAN

http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html

x_refsource_MISC

third-party-advisory

x_refsource_CERT-VN

20200131 LPE and RCE in OpenSMTPD (CVE-2020-7247)

mailing-list

x_refsource_FULLDISC

http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html

x_refsource_MISC

http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html

x_refsource_MISC

vendor-advisory

x_refsource_UBUNTU

FEDORA-2020-b92d7083ca

vendor-advisory

x_refsource_FEDORA

http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html

x_refsource_MISC

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.