CVE-2020-7247

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.

References

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

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

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

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

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3