Improper Authentication in Microsoft Exchange Server - CVE-2019-1136
Published: July 10, 2019
Vulnerability identifier: #VU19079
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1136
CWE-ID: CWE-287
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Exchange Server
Microsoft Exchange Server
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges within the Microsoft Exchange Server.
The vulnerability exists within the Exchange Web Services (EWS) feature when processing authentication tokens. A remote attacker with ability to perform man-in-the-middle (MitM) attack and forward the authentication request to Exchange server can impersonate victim and gain unauthorized access to the server.
How to mitigate CVE-2019-1136
Install updates from vendor's website.