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CVE-2020-7247

Published: Jan 29, 2020Updated: Nov 7, 2025 Sources: CVE List NVD BDUCWE-78
9.8CRITICAL
NVD MITRE
EPSS Score
98.9%
Top 0.1%
CISA KEV
Active Exploitation
Since Mar 25, 2022
Exploits
10 Known
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-78CWE-755

Affected Products

openbsd
oss-project·CA
opensmtpdOn-prem
Operating Systems / unix-bsd
debian
oss-project·GBaka debian gnu/linux
debian linuxOn-premOS
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
canonical
commercial·GBaka canonical ltd.
ubuntu linuxOn-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
OpenBSD Project
oss-project·USaka openbsd
OpenSMTPDOn-prem
Operating Systems / unix-bsd
and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 25, 2022
Remediation due:Apr 15, 2022

Required action: Apply updates per vendor instructions.

10 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
packetstormsecurity.com
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
packetstormsecurity.com
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
packetstormsecurity.com
and 15 more references View all →

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