Vulnerability Details CVE-2020-7247
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.941
EPSS Ranking 99.9%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 10.0
Proposed Action
smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.
Ransomware Campaign
Unknown
References
- http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html
- http://seclists.org/fulldisclosure/2020/Jan/49
- http://www.openwall.com/lists/oss-security/2020/01/28/3
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://seclists.org/bugtraq/2020/Jan/51
- https://usn.ubuntu.com/4268-1/
- https://www.debian.org/security/2020/dsa-4611
- https://www.kb.cert.org/vuls/id/390745
- https://www.openbsd.org/security.html
- http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html
- http://seclists.org/fulldisclosure/2020/Jan/49
- http://www.openwall.com/lists/oss-security/2020/01/28/3
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://seclists.org/bugtraq/2020/Jan/51
- https://usn.ubuntu.com/4268-1/
- https://www.debian.org/security/2020/dsa-4611
- https://www.kb.cert.org/vuls/id/390745
- https://www.openbsd.org/security.html
Products affected by CVE-2020-7247
-
cpe:2.3:a:openbsd:opensmtpd:6.6
-
cpe:2.3:o:canonical:ubuntu_linux:18.04
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cpe:2.3:o:canonical:ubuntu_linux:19.10
-
cpe:2.3:o:debian:debian_linux:10.0
-
cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:fedoraproject:fedora:32