CVE-2020-7247

9.8 CRITICAL CISA KEV - Actively Exploited

Published: January 29, 2020 Modified: November 07, 2025

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

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

Source: cve@mitre.org

Exploit Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Exploit Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Exploit Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Exploit Third Party Advisory VDB Entry

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

Source: cve@mitre.org

Broken Link Third Party Advisory VDB Entry

http://seclists.org/fulldisclosure/2020/Jan/49

Source: cve@mitre.org

Exploit Mailing List Third Party Advisory

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

Source: cve@mitre.org

Exploit Mailing List Third Party Advisory

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

Source: cve@mitre.org

Patch

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/

Source: cve@mitre.org

Mailing List Third Party Advisory

https://seclists.org/bugtraq/2020/Jan/51

Source: cve@mitre.org

Mailing List Third Party Advisory

https://usn.ubuntu.com/4268-1/

Source: cve@mitre.org

Third Party Advisory

https://www.debian.org/security/2020/dsa-4611

Source: cve@mitre.org

Mailing List Third Party Advisory

https://www.kb.cert.org/vuls/id/390745

Source: cve@mitre.org

Third Party Advisory US Government Resource

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

Source: cve@mitre.org

Patch Vendor Advisory

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