Deserialization of untrusted data in Microsoft Exchange Server - CVE-2020-0688
Published: February 11, 2020 / Updated: August 3, 2023
Vulnerability identifier: #VU25226
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2020-0688
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Microsoft Exchange Server
Microsoft Exchange Server
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary on the system.
The vulnerability exists due to an input validation error within the Microsoft Exchange OCP interface when processing VIEWSTATE data. A remote authenticated attacker can send a specially crafted HTTP request to a vulnerable Exchange server and execute arbitrary code on the target system.
Note, this vulnerability is being actively exploited in the wild.
How to mitigate CVE-2020-0688
Install updates from vendor's website.