#VU80670 Improper Authentication in Microsoft Exchange Server - CVE-2023-36757
Published: September 12, 2023 / Updated: September 20, 2023
Vulnerability identifier: #VU80670
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-36757
CWE-ID: CWE-287
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to an error in the processing authentication requests. A remote user on the local network can obtain a victim's Net-NTLMv2 hash and perform an NTLM Relay attack against another service to authenticate as the user.
Remediation
Install updates from vendor's website.