Microsoft Windows Print Spooler 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 Print Spooler service. By creating a directory junction, an attacker can abuse the Print Spooler service to delete 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://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-17014
Disclosure Timeline
- 2020-09-02 - Vulnerability reported to vendor
- 2020-11-11 - Coordinated public release of advisory
- 2020-12-01 - Advisory Updated
Credit
JeongOh Kyea (@kkokkokye) of THEORI
