CVE-2020-8793

Name: CVE-2020-8793
Creator: NVD / NIST
Published: 2020-02-25T17:15:13.103+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2020-8793 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

0.90%

55.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Opensmtpd	Opensmtpd	< 6.6.4
Fedoraproject	Fedora	32
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10

References

http://seclists.org/fulldisclosure/2020/Feb/28Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/24/4Exploit, Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
https://usn.ubuntu.com/4294-1/Third Party Advisory
https://www.openbsd.org/security.htmlThird Party Advisory
http://seclists.org/fulldisclosure/2020/Feb/28Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/24/4Exploit, Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
https://usn.ubuntu.com/4294-1/Third Party Advisory
https://www.openbsd.org/security.htmlThird Party Advisory

Timeline

Published: Feb 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8793?

How severe is CVE-2020-8793?

CVE-2020-8793 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8793?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8793?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST