Microsoft’s patched some 111 vulnerabilities including one for Windows Print Spooler. That vulnerability, discovered by Peleg Hadar and Tomer Bar of SafeBreach Labs, caught the eye of security experts, as hackers can exploit it to elevate privileges and execute arbitrary code. Dubbed PrintDemon and known by , the flaw impacts all Windows versions released since 1996.
Interestingly, the bug was previously exploited by the notorious (“spoolsv.exe”) is one such service bundled with every Windows version. It serves as an interface between the OS, software components, printer drivers, and printer. It’s the magic that queues and forwards your print jobs, tracks their progress, and communicates these events between user applications and the printer. The spooler is implemented as a service daemon, from which the moniker, PrintDemon, is derived.
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