Code Injection in Microsoft Windows and Windows Server - CVE-2021-1675

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the Windows Print Spooler service. A remote attacker can trick the victim to open a specially crafted file and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, this is a description of the original vulnerability fixed by Microsoft on June 9, 2021. A different vulnerability than #VU53886 (CVE-2021-34527) for which an exploit was made publicly available.

Affected software

How to mitigate CVE-2021-1675

Links to Public Exploits and PoC-codes

• Exploit #8337 - Exploits (All CVE Exploits used by connor including code.) (September 4, 2022)
• Exploit #7887 - Print Spooler Remote DLL Injection (May 24, 2022)
• Exploit #7335 - NimNightmare (CVE-2021-1675 LPE PoC in Nim (PrintNightmare Local Privilege Escalation)) (February 9, 2022)
• Exploit #7322 - CVE-2021-1675 (PrintNightmare Local Privilege Escalation ) (February 6, 2022)
• Exploit #7103 - NimNightmare (CVE-2021-1675 LPE PoC in Nim (PrintNightmare Local Privilege Escalation)) (December 6, 2021)
• Exploit #6825 - CVE-2021-1675-PrintNightmare (Working PowerShell POC) (October 6, 2021)
• Exploit #6544 - Microsoft-CVE-2021-1675 () (July 19, 2021)
• Exploit #6524 - Print Spooler Remote DLL Injection (July 8, 2021)

External References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675

Related Security Bulletins

• Remote code execution in Microsoft Windows Print Spooler
• Multiple vulnerabilities in Dell EMC Unisphere for PowerMax and Dell EMC Solutions Enabler