Microsoft Finds One More Windows Print Spooler Zero-day Bug

Share post:

Microsoft has released an advisory for another zero-day Windows print spooler vulnerability called CVE-2021-36958 that allows local attackers to gain SYSTEM privileges on a computer.

This vulnerability is part of a class of bugs known as “PrintNightmare” that misuse configuration settings for the Windows print spooler, printer drivers, and Windows Point and Print function.

Microsoft released security updates in both July and August to fix several vulnerabilities in PrintNightmare.

A zero-day vulnerability in the Windows Print Spooler, identified by security expert Benjamin Delpy as CVE-2021-36958, allows threat actors to quickly gain SYSTEM privileges by simply connecting to a remote print server.

While Microsoft’s recent security updates have changed the installation procedures for printer drivers to require admin privileges, users do not need to enter admin privileges to connect to a printer if that driver is already installed.

If the driver is on a client and thus does not need to be installed, the connection to a remote printer will still execute the CopyFile directive for non-administrators.

This vulnerability allows Delpy’s DLL to be copied to the client and executed to open a SYSTEM-level command prompt.

For more information, read the original story in BleepingComputer.

Featured Tech Jobs


Related articles

Liberals to add ‘fundamental right to privacy’ to proposed law, but no details yet

As committee hearing start the Innovation minister promises changes to privacy law to meet complaints. Details to fo

Cyber Security Today, Sept. 27 2023 – Hackers are targeting luxury hotels, a Red Cross scam and more

This episode reports on phishing campaigns against the hospitality sector, a new ransomware operato

Ransomware attacks on U.S. public sector at record high

Ransomware attacks on the U.S. public sector are on track to reach record levels in 2023, with both...

APT hacking group AtlasCross targets organizations

A new advanced persistent threat (APT) hacking group named AtlasCross has been discovered targeting organizations with phishing lures...

Become a member

New, Relevant Tech Stories. Our article selection is done by industry professionals. Our writers summarize them to give you the key takeaways