Another new zero-day vulnerability in “Windows Printing Spooler Service” has been reported by Microsoft. The experts of Microsoft have also stated that the threat actors who can strongly exploit this vulnerability could easily run the arbitrary code with SYSTEM privileges.
Microsoft recently patched remote code execution vulnerability in Windows Print Spooler. The flaw allows a remote authenticated attacker to attacker execute arbitrary code with SYSTEM privileges. This is another vulnerability that is the same critical as the previous one.
Microsoft, after detecting another zero-day bug has started investigating this vulnerability, not only this, but they have also started showing workarounds and developing patches as well.
Here we have mentioned the flaw profile below, to make it more simple:-
Mimikatz creator Benjamin Delpy along with the security researchers started investigating this vulnerability and has already released multiple bypasses and updates to exploits with the help of specially crafted printer drivers and by violating the Windows APIs.
According to the experts, this new method effectively enables anyone, that also include the threat actors, to get administrative prerogatives just by installing the remote print driver.
Moreover, this method is quite useful for threat actors who are planning to breach networks for the deployment of ransomware because it enables quick and easy access to central privileges on a device that encourages them to spread parallel through a network.
Here is the list of critical bugs that are addressed in August mentioned below:-
As we said above that this remote printer server can be abused by anyone, as well as by the threat actors to get SYSTEM level privileges on a Windows device, therefore the experts have suggested some mitigation to bypass such vulnerability, and here they are mentioned below:-
‘Package Point and print policy prevent non-administrative users from installing the print drivers, as it uses the Point and Print until and unless the print server is on the recommended list.
However, to allow this policy, initially launch the Group Policy Editor and then navigate to User Configuration > Administrative Templates > Control Panel > Printers > Package Point and Print and lastly Approved the Servers.
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