Vulnerability identifier: #VU70912
Vulnerability risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-300
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
Microsoft Exchange Server
Server applications /
Mail servers
Vendor: Microsoft
Description
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.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Microsoft Exchange Server: 2019 Preview 15.02.0196.000 - 2019 CU12 Nov22SU 15.02.1118.020, 2013 RTM 15.00.0516.032 - 2013 CU23 Nov22SU 15.00.1497.044, 2016 Preview 15.01.0225.016 - 2016 CU23 Nov22SU 15.01.2507.016
External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21762
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.