Microsoft Azure Active Directory Connect 1.6.4.0/2.0.3.0 improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Azure Active Directory Connect 1.6.4.0/2.0.3.0 and classified as critical. This issue affects some unknown processing. The manipulation results in improper authentication. This vulnerability is reported as CVE-2021-36949. The attacker must have access to the local network to execute the attack. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Azure Active Directory Connect 1.6.4.0/2.0.3.0 (Cloud Software). It has been classified as critical. Affected is an unknown code. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 08/10/2021 as confirmed security guidance (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2021-36949. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. In addition to applying the updates in this CVE, you will need to disable NTLM as per the guidance as follows: For Azure Active Directory Connect, see Prerequisites for Azure AD Connect (https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/how-to-connect-install-prerequisites#harden-your-azure-ad-connect-server) For Azure Active Directory Connect Provisioning Agent, see Prerequisites for Azure AD Connect cloud sync (https://learn.microsoft.com/en-us/entra/identity/hybrid/cloud-sync/how-to-prerequisites?tabs=public-cloud).

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.1
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.1
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CNA Base Score: 7.1
CNA Vector (Microsoft): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

07/19/2021 🔍
08/10/2021 +22 days 🔍
08/10/2021 +0 days 🔍
08/10/2021 +0 days 🔍
08/11/2026 +1827 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-36949 (🔍)
GCVE (CVE): GCVE-0-2021-36949
GCVE (VulDB): GCVE-100-180492

Entryinfo

Created: 08/10/2021 21:03
Updated: 08/11/2026 12:30
Changes: 08/10/2021 21:03 (15), 08/10/2021 21:04 (19), 08/10/2021 21:07 (20), 08/15/2021 10:05 (2), 10/27/2023 13:56 (1), 11/20/2023 12:08 (1), 08/11/2026 12:30 (41)
Complete: 🔍
Committer: lywand
Cache ID: 216::103

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