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CVE-2020-7247

CRITICALCISA KEV

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/29/2020

Last Modified11/7/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorOpenBSD

ProductOpenSMTPD

Vulnerability NameOpenSMTPD Remote Code Execution Vulnerability

KEV Date Added2022-03-25

Remediation Due Date2022-04-15

Ransomware UseUnknown

Affected Products

canonical:ubuntu_linuxdebian:debian_linuxfedoraproject:fedoraopenbsd:opensmtpd

Weaknesses (CWE)

CWE-78CWE-755CWE-755

References

http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html(cve@mitre.org)

http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html(cve@mitre.org)

http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html(cve@mitre.org)

http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html(cve@mitre.org)

http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html(cve@mitre.org)

http://seclists.org/fulldisclosure/2020/Jan/49(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2020/01/28/3(cve@mitre.org)

https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/(cve@mitre.org)

https://seclists.org/bugtraq/2020/Jan/51(cve@mitre.org)

https://usn.ubuntu.com/4268-1/(cve@mitre.org)

https://www.debian.org/security/2020/dsa-4611(cve@mitre.org)

https://www.kb.cert.org/vuls/id/390745(cve@mitre.org)

https://www.openbsd.org/security.html(cve@mitre.org)

http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html(af854a3a-2127-422b-91ae-364da2661108)

http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html(af854a3a-2127-422b-91ae-364da2661108)

http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html(af854a3a-2127-422b-91ae-364da2661108)

http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html(af854a3a-2127-422b-91ae-364da2661108)

http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html(af854a3a-2127-422b-91ae-364da2661108)

http://seclists.org/fulldisclosure/2020/Jan/49(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2020/01/28/3(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/(af854a3a-2127-422b-91ae-364da2661108)

https://seclists.org/bugtraq/2020/Jan/51(af854a3a-2127-422b-91ae-364da2661108)

https://usn.ubuntu.com/4268-1/(af854a3a-2127-422b-91ae-364da2661108)

https://www.debian.org/security/2020/dsa-4611(af854a3a-2127-422b-91ae-364da2661108)

https://www.kb.cert.org/vuls/id/390745(af854a3a-2127-422b-91ae-364da2661108)

https://www.openbsd.org/security.html(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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