Advisory Details

September 29th, 2022

Microsoft Windows Active Directory Certificate Services Improper Authorization Privilege Escalation Vulnerability

ZDI-22-1324
ZDI-CAN-16216

CVE ID CVE-2022-34691
CVSS SCORE 8.4, AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to escalate privileges on affected installations of Microsoft Windows Active Directory Certificate Services. Authentication is required to exploit this vulnerability.

The specific flaw exists within the issuance of certificates. By including crafted data in a certificate request, an attacker can obtain a certificate that allows the attacker to authenticate to a domain controller with a high level of privilege. An attacker can leverage this vulnerability to escalate privileges and disclose stored credentials, leading to further compromise.

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-2022-34691
DISCLOSURE TIMELINE
  • 2022-02-04 - Vulnerability reported to vendor
  • 2022-09-29 - Coordinated public release of advisory
CREDIT Oliver Lyak (@ly4k_)
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