Advisory Details

February 10th, 2021

Microsoft Windows Device Management Enrollment Service Directory Junction Information Disclosure Vulnerability

ZDI-21-178
ZDI-CAN-12154

CVE ID CVE-2021-24084
CVSS SCORE 5.5, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to disclose sensitive information 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 directory junction, an attacker can abuse the Device Management Enrollment Service to disclose the contents of arbitrary files. An attacker can leverage this vulnerability to disclose information 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-2021-24084
DISCLOSURE TIMELINE
  • 2020-10-28 - Vulnerability reported to vendor
  • 2021-02-10 - Coordinated public release of advisory
CREDIT Abdelhamid Naceri (halov)
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