Microsoft Exchange PowerShell Deserialization of Untrusted Data Remote Code Execution Vulnerability

October 17th, 2022
ZDI-22-1624 ZDI-CAN-18333

CVE ID

CVE-2022-41082

CVSS Score

8.8 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Microsoft

Affected Products

Exchange

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.

The specific flaw exists within the PowerShell endpoint. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082

Disclosure Timeline

  • 2022-10-20 - Vulnerability reported to vendor
  • 2022-10-17 - Coordinated public release of advisory
  • 2022-11-22 - Advisory Updated

Credit

DA-0x43-Dx4-DA-Hx2-Tx2-TP-S-Q from GTSC

Back to Advisories