Permissions, Privileges, and Access Controls in Microsoft Exchange Server - CVE-2023-21709
Published: August 8, 2023 / Updated: August 8, 2023
Vulnerability identifier: #VU79146
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-21709
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in Microsoft Exchange Server. A remote attacker can perform a brute-force attack, which leads to security restrictions bypass and privilege escalation.
Affected software
Microsoft Exchange Server
How to mitigate CVE-2023-21709
Install updates from vendor's website.
Microsoft Exchange Server - addressed in versions 2016 CU23 Aug23SU 15.01.2507.031, 2019 CU12 Aug23SU 15.02.1118.036, 2019 CU13 Aug23SU 15.02.1258.023