Microsoft Windows DosDevices Activation Context Cache Poisoning Local Privilege Escalation Vulnerability
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
- 2023-01-17 - Advisory Updated
Credit
Simon Zuckerbraun - Trend Micro Zero Day Initiative
