What is CVE-2021-3670?

CVE-2021-3670 is a medium-severity software vulnerability (Uncontrolled resource consumption) with a CVSS score of 6.5. MaxQueryDuration not honoured in Samba AD DC LDAP

Is CVE-2021-3670 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 2%.

What products does CVE-2021-3670 affect?

Tracked products affected include Samba. Check the version you run to see whether it is affected.

How do I fix CVE-2021-3670?

Apply the vendor fix in your normal patch cycle. An official patch or advisory is available. Upgrade affected products to a fixed version.

← All products

CVE-2021-3670

MEDIUM severity · CVSS 6.5 · Uncontrolled resource consumption

6.5CVSS MEDIUM

Summary

MaxQueryDuration not honoured in Samba AD DC LDAP

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)2%

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

Affected products we track (1)

Samba

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=2077533 ↗

Additional information

NVD record
https://bugzilla.redhat.com/show_bug.cgi?id=2077533Patch
https://bugzilla.samba.org/show_bug.cgi?id=14694Patch
https://gitlab.com/samba-team/samba/-/commit/1d5b155619bc532c46932965b215bd73a920e56fPatch
https://gitlab.com/samba-team/samba/-/commit/2b3af3b560c9617a233c131376c870fce146c002Patch
https://gitlab.com/samba-team/samba/-/commit/3507e96b3dcf0c0b8eff7b2c08ffccaf0812a393Patch
https://gitlab.com/samba-team/samba/-/commit/5f0590362c5c0c5ee20503a67467f9be2d50e73bPatch
https://gitlab.com/samba-team/samba/-/commit/86fe9d48883f87c928bf31ccbd275db420386803Patch
https://gitlab.com/samba-team/samba/-/commit/dcfcafdbf756e12d9077ad7920eea25478c29f81Patch