CVE-2023-23413 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 • 04/07/2023
The vulnerability identified as CVE-2023-23413 represents a critical remote code execution flaw within Microsoft's PostScript and PCL6 Class Printer Driver components. This issue affects systems that utilize these printer drivers for handling print jobs, particularly in enterprise environments where networked printing is prevalent. The vulnerability stems from improper input validation mechanisms within the printer driver software that processes incoming print data from networked devices or applications. Attackers can exploit this weakness by crafting malicious print jobs that contain specially formatted data, potentially leading to arbitrary code execution on vulnerable systems. The flaw exists in the way these drivers handle specific printer command sequences and data structures, creating a pathway for malicious actors to bypass standard security controls. This vulnerability is particularly concerning as it can be exploited remotely without requiring user interaction, making it a prime target for automated attacks and lateral movement within networks.
The technical implementation of this vulnerability falls under the category of buffer overflow conditions as classified by CWE-121, where insufficient bounds checking allows attackers to overwrite memory regions within the printer driver process. The flaw specifically manifests when processing certain PostScript or PCL6 commands that contain oversized data payloads or malformed command sequences. The printer driver components lack proper validation of input parameters, allowing attackers to inject malicious code that executes with the privileges of the printing service account. This typically runs with elevated privileges on the target system, potentially providing attackers with system-level access. The vulnerability affects multiple versions of Windows operating systems that include the affected printer drivers, with the most impacted versions being Windows 10, Windows 11, and various server editions. The attack vector requires network connectivity to the target system and typically involves sending specially crafted print jobs through the print spooler service, which then processes these malicious payloads through the vulnerable driver components.
The operational impact of CVE-2023-23413 extends beyond simple remote code execution, as it can enable attackers to establish persistent access within network environments. Once exploited, adversaries can leverage this vulnerability to deploy additional malware, conduct reconnaissance activities, or use the compromised system as a launch point for further attacks against other networked devices. The vulnerability aligns with ATT&CK technique T1059.001 for command and script interpreter, as attackers can execute arbitrary commands through the compromised printer driver process. Security researchers have noted that the vulnerability can be particularly dangerous in multi-tenant environments where shared printing infrastructure exists, as a successful exploitation could potentially allow attackers to compromise multiple organizations' systems. The threat landscape for this vulnerability includes nation-state actors, advanced persistent threat groups, and opportunistic attackers who seek to exploit unpatched systems. Organizations with outdated printer driver installations pose the greatest risk, as these systems lack the security mitigations introduced in recent updates and patches.
Mitigation strategies for CVE-2023-23413 should prioritize immediate patch deployment from Microsoft, as the vendor has released security updates addressing this specific vulnerability. Organizations should implement network segmentation to isolate printing infrastructure from critical business systems, reducing the potential impact of successful exploitation. The principle of least privilege should be enforced by configuring printer driver services to run with minimal required permissions, limiting the damage that could result from exploitation. Network-based mitigations include implementing firewall rules to restrict access to print spooler services and monitoring print job traffic for suspicious patterns. Security administrators should also consider disabling unnecessary printer driver functionality and regularly auditing print server configurations to identify and remediate potential attack vectors. The implementation of endpoint detection and response solutions can help identify exploitation attempts by monitoring for unusual process behavior or memory access patterns associated with the vulnerable driver components. Organizations should conduct regular vulnerability assessments focusing on printer infrastructure and maintain updated inventories of all installed printer drivers to ensure comprehensive coverage of security patches. The vulnerability demonstrates the importance of maintaining up-to-date printer driver components, as these often receive less attention than core operating system security updates, creating persistent attack surfaces for threat actors.