Advisory Details

January 15th, 2020

Microsoft Windows Device Management Enrollment Service Hard Link Denial-of-Service Vulnerability

ZDI-20-124
ZDI-CAN-9377

CVE ID CVE-2020-0616
CVSS SCORE 7.3, (AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
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 Device Management Enrollment Service. By creating a hard link, an attacker can abuse the service to overwrite the contents of a chosen 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-2020-0616
DISCLOSURE TIMELINE
  • 2019-10-03 - Vulnerability reported to vendor
  • 2020-01-15 - Coordinated public release of advisory
CREDIT Jeong Oh Kyea(@kkokkokye) of THEORI
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