CVE-2021-3670

published 2022-08-09

CVE-2021-3670: MaxQueryDuration not honoured in Samba AD DC LDAP FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore…

medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

MaxQueryDuration not honoured in Samba AD DC LDAP

FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.

Mariner: Mariner

redhat: redhat

Customer Action Required: Yes

Remediation: CBL-Mariner Releases

Reference: https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade

Affected

5 ranges

Vendor	Product	Version range	Fixed in
debian	ldb	< ldb 2:2.2.3-1 (bullseye)	ldb 2:2.2.3-1 (bullseye)
debian	samba	< ldb 2:2.2.3-1 (bullseye)	ldb 2:2.2.3-1 (bullseye)
msrc	cbl2_samba_on_cbl_mariner_2.0	—	—
samba	samba	>= 0 < 2:4.13.17~dfsg-0ubuntu1.20.04.1	2:4.13.17~dfsg-0ubuntu1.20.04.1
samba	samba	>= 0 < 2:4.15.9+dfsg-0ubuntu0.2	2:4.15.9+dfsg-0ubuntu0.2

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 6.5 MEDIUM

vendor_debian 6.5 MEDIUM

vendor_msrc 6.5 MEDIUM

vendor_redhat 6.5 MEDIUM

vendor_ubuntu 6.5 MEDIUM

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-400 CWE-770