Advisory Details

October 14th, 2022

Microsoft Windows CSRSS DosDevices Local Privilege Escalation Vulnerability

ZDI-22-1410
ZDI-CAN-17847

CVE ID CVE-2022-37987
CVSS SCORE 7.8, (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the CSRSS.exe process. By performing a DOS device redirection, an attacker can alter a path used for searching for dependencies. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary 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-2022-37987
DISCLOSURE TIMELINE
  • 2022-07-11 - Vulnerability reported to vendor
  • 2022-10-14 - Coordinated public release of advisory
CREDIT Simon Zuckerbraun - Trend Micro Zero Day Initiative
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