Microsoft Windows AppX Deployment Service Link Resolution 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 AppX Deployment Service. By creating a junction, an attacker can abuse the service to delete the contents of a chosen file or folder. 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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0776
Disclosure Timeline
- 2019-11-28 - Vulnerability reported to vendor
- 2020-03-12 - Coordinated public release of advisory
Credit
JeongOh Kyea(@kkokkokye) of THEORI
