CVE-2020-3811: High severity netqmail netqmail vulnerability
Published May 19, 2020
·Updated
Last updated 25 August 2025
Other sources
qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.
— Launchpad
Affected Software
6 affected componentsFixes available
debian/netqmail<=1.06-6, <=1.06-5, <=1.06-6.1
1.06-6.2~deb10u11.06-6.21.06-6.2~deb9u1
debian/netqmail
netqmail netqmail=1.06
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Canonical Ubuntu Linux=20.04
Remediation
Patch Available
Event History
May 26, 2020
CVE Published
via MITRE·01:04 PM
Data Sourced
via MITRE·01:04 PM
DescriptionWeakness
Jan 11, 2024
Data Sourced
via Launchpad·11:51 PM
Description
Feb 16, 2026
Data Sourced
via Ubuntu·07:49 PM
RemedyDescriptionSeverityAffected Software
Frequently Asked Questions
1
What is CVE-2020-3811?
CVE-2020-3811 is a vulnerability in qmail-verify as used in netqmail 1.06 that allows for mail-address verification bypass.
2
How severe is CVE-2020-3811?
CVE-2020-3811 has a severity rating of 7.5 (High).
3
Which software versions are affected by CVE-2020-3811?
netqmail versions 1.06-6.2~deb10u1, 1.06-6.2, and 1.06-6.2~deb9u1 are affected by CVE-2020-3811.
4
How can I fix CVE-2020-3811?
To fix CVE-2020-3811, update netqmail to version 1.06-6.2~deb10u1, 1.06-6.2, or 1.06-6.2~deb9u1.
5
Where can I find more information about CVE-2020-3811?
You can find more information about CVE-2020-3811 at the following references: [1] [2] [3].