The shift to hybrid work models has exposed new vulnerabilities in corporate print infrastructure and heightened security risks at many organizations.
The risks run the gamut and include employees using insecure and unmanaged printers, remote workers sending print jobs over public networks, inadequate user authentication and print job release processes, exposed local spools and caches, and inconsistent patching practices.
A relatively low but steady volume of print-related vulnerabilities have exacerbated these issues. Recent examples of such vulnerabilities include CVE-2024-38199 (a remote code execution [RCE] vulnerability in the Windows or Line Printer Daemon [LPD] Service), CVE-2024-21433 (a Windows Print Spooler elevation of privilege vulnerability), and CVE-2024-43529 (a similar vulnerability that Microsoft disclosed in its October security update). The threats are certainly not Windows-specific, either. Recently, researchers discovered a set of potentially severe flaws in Common Unix Printing System (CUPS), a legacy protocol largely used in Linux, Unix, and heterogeneous environments.
Though few of these flaws have presented as major a threat as the PrintNightmare RCE flaw from 2021 in the Windows Print Spooler service, they have complicated the challenge of managing modern print infrastructure. Attackers, including nation-state actors, have sometimes abused printer software vulnerabilities — like CVE-2022-38028 — to substantial effect in their campaigns.
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