Man-in-the-Middle (MitM) attack in Microsoft Exchange Server - CVE-2023-21762
Published: January 10, 2023
Vulnerability identifier: #VU70912
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-21762
CWE-ID: CWE-300
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform MitM attack.
The vulnerability exists due to unspecified error. A remote user on the local network can perform spoofing attack and obtain NTLM hashes of other Exchange users.
Affected software
Microsoft Exchange Server
How to mitigate CVE-2023-21762
Install updates from vendor's website.
Microsoft Exchange Server - addressed in versions 2013 CU23 Jan23SU 15.00.1497.045, 2016 CU23 Jan23SU 15.01.2507.017, 2019 CU11 Jan23SU 15.02.0986.037, 2019 CU12 Jan23SU 15.02.1118.021