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K
zdiOliver Lyak (@ly4k_)ZDI-22-734
HistoryMay 10, 2022 - 12:00 a.m.

Microsoft Windows Print Spooler Service Link Following Local Privilege Escalation Vulnerability

2022-05-1000:00:00
Oliver Lyak (@ly4k_)
www.zerodayinitiative.com
29
microsoft windows
print spooler
local privilege escalation
vulnerability
arbitrary dll
low-privileged code

EPSS

0.001

Percentile

25.2%

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.