Improper Authentication in Microsoft Azure Active Directory Connect



| Updated: 2021-08-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-36949
CWE-ID CWE-287
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Azure Active Directory Connect
Client/Desktop applications / Other client software

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU55733

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-36949

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in the Microsoft Azure Active Directory Connect. A remote authenticated attacker on the local network can perform a man-in-the-middle (MitM) attack and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Azure Active Directory Connect: 1.6.4.0 - 2.0.3.0

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36949


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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