Advisory Details

May 10th, 2022

Microsoft Windows Print Spooler Service Link Following Local Privilege Escalation Vulnerability

ZDI-22-734
ZDI-CAN-16251

CVE ID CVE-2022-29104
CVSS SCORE 7.0, (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges 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 symbolic link, an attacker can cause the service to load an arbitrary DLL. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code 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-2022-29104
DISCLOSURE TIMELINE
  • 2022-02-23 - Vulnerability reported to vendor
  • 2022-05-10 - Coordinated public release of advisory
CREDIT Oliver Lyak (@ly4k_)
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