Microsoft Windows Event Tracing Directory Junction Denial-of-Service Vulnerability
Vulnerability Details
This vulnerability allows local attackers to create a denial-of-service condition 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 implementation of Event Tracing for Windows. By creating a directory junction, an attacker can abuse Event Tracing to overwrite a file. An attacker can leverage this vulnerability to create a denial-of-service condition on the 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-2021-26425
Disclosure Timeline
- 2021-04-22 - Vulnerability reported to vendor
- 2021-08-11 - Coordinated public release of advisory
Credit
Abdelhamid Naceri (halov)
