Zero-day vulnerability in Windows

Man-in-the-Middle (MitM) attack
CVE-2022-26925

Vulnerability details

Advisory: SB2022051007 - Spoofing attack in Microsoft Windows LSA

Vulnerable component: Windows

CVE-ID: CVE-2022-26925

CVSSv3 score: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists within the Windows LSA service. A remote attacker can call a method on the LSARPC interface and coerce the domain controller to authenticate to the attacker using NTLM. As a result, an attacker can obtain credentials and compromise the affected system via the NTLM Relay Attack.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-26925

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.