CVE-2023-24907 in Windows
Summary
by MITRE • 03/14/2023
Microsoft PostScript and PCL6 Class Printer Driver Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 04/08/2023
This vulnerability exists within Microsoft's PostScript and PCL6 class printer drivers, representing a critical remote code execution flaw that could allow attackers to execute arbitrary code on affected systems. The vulnerability stems from improper input validation within the printer driver components that process print jobs containing maliciously crafted PostScript or PCL6 commands. When a user submits a print job with malformed data structures, the driver fails to properly sanitize the input, creating an opportunity for attackers to inject malicious code that executes with the privileges of the print spooler service.
The technical nature of this flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-787, which addresses out-of-bounds write vulnerabilities. Attackers can exploit this weakness by crafting specially formatted print jobs that trigger memory corruption when processed by the vulnerable printer drivers. The vulnerability is particularly dangerous because it operates at the system level where print spooler services typically run with elevated privileges, potentially allowing full system compromise without user interaction. The attack vector requires only that a victim submit a malicious print job to a vulnerable printer, making it particularly concerning for enterprise environments where multiple users have access to shared printing resources.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Microsoft printer drivers, as it enables remote exploitation without requiring physical access to target systems. The attack can be executed through network-based print servers or directly through local print queues, making it difficult to detect and prevent. According to MITRE ATT&CK framework, this vulnerability maps to technique T1059.001 for command and scripting interpreter, and T1068 for exploit for privilege escalation. The impact extends beyond simple code execution to potential data exfiltration, system persistence, and lateral movement within network environments where compromised print servers exist.
Organizations should implement immediate mitigations including applying Microsoft's security patches, disabling unnecessary print services, and implementing network segmentation to isolate print servers from critical infrastructure. The print spooler service should be configured with minimal required privileges, and print job validation should be enhanced through network monitoring and intrusion detection systems. Additional protective measures include disabling the print server service on systems that do not require it, implementing strict access controls for print queues, and conducting regular vulnerability assessments of printer infrastructure. Security teams should also monitor for unusual print job patterns and implement automated response procedures to quarantine potentially malicious print jobs before they can execute on target systems.