CVE-2021-3670

Name: CVE-2021-3670
Creator: NVD / NIST
Published: 2022-08-23T16:15:09.393+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.73%

Last modified Jun 17, 2026

CVE-2021-3670 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. MaxQueryDuration not honoured in Samba AD DC LDAP. EPSS estimates a 1.73% chance of exploitation in the next 30 days.

Description

MaxQueryDuration not honoured in Samba AD DC LDAP

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.73%

74.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Samba	Samba	>= 4.1.0, < 4.16.0
Redhat	Storage	3.0
Fedoraproject	Fedora	35

References

https://bugzilla.redhat.com/show_bug.cgi?id=2077533Issue Tracking, Patch, Third Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=14694Issue Tracking, Patch, Vendor Advisory
https://gitlab.com/samba-team/samba/-/commit/1d5b155619bc532c46932965b215bd73a920e56fPatch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/2b3af3b560c9617a233c131376c870fce146c002Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/3507e96b3dcf0c0b8eff7b2c08ffccaf0812a393Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/5f0590362c5c0c5ee20503a67467f9be2d50e73bPatch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/86fe9d48883f87c928bf31ccbd275db420386803Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/dcfcafdbf756e12d9077ad7920eea25478c29f81Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/e1ab0c43629686d1d2c0b0b2bcdc90057a792049Patch, Third Party Advisory
https://security.gentoo.org/glsa/202309-06Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2077533Issue Tracking, Patch, Third Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=14694Issue Tracking, Patch, Vendor Advisory
https://gitlab.com/samba-team/samba/-/commit/1d5b155619bc532c46932965b215bd73a920e56fPatch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/2b3af3b560c9617a233c131376c870fce146c002Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/3507e96b3dcf0c0b8eff7b2c08ffccaf0812a393Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/5f0590362c5c0c5ee20503a67467f9be2d50e73bPatch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/86fe9d48883f87c928bf31ccbd275db420386803Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/dcfcafdbf756e12d9077ad7920eea25478c29f81Patch, Third Party Advisory
https://gitlab.com/samba-team/samba/-/commit/e1ab0c43629686d1d2c0b0b2bcdc90057a792049Patch, Third Party Advisory
https://security.gentoo.org/glsa/202309-06Third Party Advisory

Timeline

Published: Aug 23, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-3670?

MaxQueryDuration not honoured in Samba AD DC LDAP

How severe is CVE-2021-3670?

CVE-2021-3670 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3670?

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-2021-3670?

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

Scan your code now

Source: NVD / NIST