CVE-2020-7247 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-03-25
A remote code execution vulnerability exists in OpenSMTPD's smtp_mailaddr function due to incorrect input validation of the MAIL FROM field. Attackers can exploit this via shell metacharacters in a crafted SMTP session to execute arbitrary commands as root in the default configuration.
Yes. CVE-2020-7247 is known to be exploited in the wild, first recorded on 25 March 2022. Treat it as urgent.
How severe is CVE-2020-7247?
Critical severity, with a CVSS score of 9.8, published 25 March 2022.
Which products and versions are affected?
OpenBSD OpenSMTPD 6.6; OpenBSD OpenBSD 6.6.
Is there a fix for CVE-2020-7247?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-7247 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2020-7247?
Check whether you run OpenBSD OpenSMTPD. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
OpenBSD OpenSMTPD 6.6
OpenBSD OpenBSD 6.6
Timeline
2020-01-28: disclosed: Initial public disclosure via Openwall and Seclists
2022-03-25: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2022-03-25: exploited: Confirmed as exploited in the wild per CISA KEV entry