CVE-2023-35324 in Windows
Summary
by MITRE • 07/11/2023
Microsoft PostScript and PCL6 Class Printer Driver Information Disclosure Vulnerability
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Analysis
by VulDB Data Team • 07/29/2023
This vulnerability resides in Microsoft's PostScript and PCL6 class printer drivers where improper input validation allows for information disclosure through crafted print jobs. The flaw manifests when the printer driver fails to properly sanitize user-supplied data during processing of print commands, potentially exposing sensitive system information including memory contents, configuration details, or internal driver state. Such vulnerabilities typically arise from inadequate bounds checking and string handling mechanisms within the printer driver codebase. The technical implementation involves the driver's failure to validate the length or content of incoming printer commands before processing them, creating opportunities for attackers to manipulate print job data to extract unintended information from the system.
The operational impact of this vulnerability extends beyond simple information disclosure as it can provide attackers with insights into the target system's internal structure and configuration. An attacker could potentially leverage this information to craft more sophisticated attacks against the printer or underlying network infrastructure. The vulnerability affects systems running Windows operating systems that utilize these specific printer drivers for PostScript or PCL6 formatted print jobs, making it particularly concerning in enterprise environments where centralized printing infrastructure is common. This type of vulnerability aligns with CWE-20 Improper Input Validation and can be categorized under ATT&CK technique T1059 Command and Scripting Interpreter, as attackers may use the disclosed information to better target subsequent exploitation attempts.
Mitigation strategies should focus on implementing proper input validation mechanisms within printer driver code and ensuring that all incoming print job data is thoroughly sanitized before processing. Organizations should apply Microsoft security updates promptly when available, as these patches typically address the underlying validation flaws in the driver implementations. Network segmentation can help limit the potential impact of such vulnerabilities by restricting access to critical printing infrastructure. Additionally, monitoring print job submissions for unusual patterns or malformed commands can help detect potential exploitation attempts. The vulnerability demonstrates the importance of secure coding practices in device drivers and highlights the need for comprehensive security testing of printer driver components as part of overall system security assessments. Regular vulnerability scanning and penetration testing of printing infrastructure should be conducted to identify similar weaknesses that could potentially be exploited for information gathering or privilege escalation attacks.