#VU25227 Permissions, Privileges, and Access Controls in Microsoft Exchange Server - CVE-2020-0692
Published: February 11, 2020
Vulnerability identifier: #VU25227
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-0692
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to uspecified error in Microsoft Exchange Server. Exploitation of this vulnerability requires Exchange Web Services (EWS) to be enabled and in use in an affected environment. A remote attacker can change parameters in the Security Access Token, forward it to a Microsoft Exchange Server and impersonate an another Exchange user.
Remediation
Install updates from vendor's website.