Information disclosure in Microsoft Exchange Server - CVE-2023-36035
Published: November 14, 2023 / Updated: December 8, 2023
Vulnerability identifier: #VU83067
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-36035
CWE-ID: CWE-200
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to an error within the IsUNCPath method in Microsoft Exchange server. A remote user on the local network can access a user's Net-NTLMv2 hash and perform NTLM Relay attack against another service to authenticate as the user.
Affected software
Microsoft Exchange Server
How to mitigate CVE-2023-36035
Install updates from vendor's website.
Microsoft Exchange Server - addressed in versions 2016 CU23 Nov23SU 15.01.2507.035, 2019 CU12 Nov23SU 15.02.1118.040, 2019 CU13 Nov23SU 15.02.1258.028