CVE-2023-50735 in CX331adwe
Summary
by MITRE • 02/28/2024
A heap corruption vulnerability has been identified in PostScript interpreter in various Lexmark devices. The vulnerability can be leveraged by an attacker to execute arbitrary code.
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Analysis
by VulDB Data Team • 04/15/2026
The heap corruption vulnerability identified in CVE-2023-50735 resides within the PostScript interpreter component of multiple Lexmark printing devices, representing a critical security flaw that undermines the integrity of these network-connected systems. This vulnerability manifests in the improper handling of memory allocation and deallocation processes during PostScript document processing, creating opportunities for attackers to manipulate heap memory structures through crafted print jobs or network requests. The affected devices operate in environments where they process untrusted input from various sources, making them particularly susceptible to exploitation by adversaries who can leverage this weakness to gain unauthorized control over the affected hardware.
The technical flaw stems from inadequate bounds checking and memory management practices within the PostScript interpreter's heap allocation routines. When processing maliciously crafted PostScript commands, the interpreter fails to properly validate input parameters before allocating memory blocks, leading to buffer overflows or use-after-free conditions that corrupt adjacent heap memory regions. This heap corruption can be systematically exploited by attackers who construct specific PostScript documents designed to trigger memory corruption patterns that ultimately allow for arbitrary code execution. The vulnerability operates at the intersection of memory safety issues and privilege escalation, as successful exploitation can enable attackers to execute malicious code with the privileges of the PostScript interpreter process, potentially leading to complete system compromise.
The operational impact of CVE-2023-50735 extends beyond simple code execution, as it represents a significant threat to enterprise printing environments and network security infrastructure. Organizations utilizing Lexmark devices in their printing ecosystems face potential risks including unauthorized access to sensitive documents, privilege escalation attacks, and possible lateral movement within network environments. The vulnerability's exploitation requires minimal network access and can be executed through standard print job submission processes, making it particularly dangerous in environments where print servers are accessible from untrusted networks or where users have the ability to submit print jobs to networked printers. This makes the vulnerability particularly attractive to attackers seeking to establish persistent access points within corporate networks through seemingly innocuous printing infrastructure.
Mitigation strategies for CVE-2023-50735 should focus on immediate firmware updates from Lexmark to address the heap corruption issues within the PostScript interpreter, alongside network segmentation and access controls to limit exposure of affected devices. Organizations should implement strict print job filtering and content validation mechanisms to prevent potentially malicious PostScript documents from reaching vulnerable devices, while also considering network monitoring solutions that can detect anomalous print job patterns indicative of exploitation attempts. The vulnerability aligns with CWE-122 heap-based buffer overflow and CWE-787 out-of-bounds write classifications, representing a classic memory safety issue that can be addressed through proper input validation and memory management practices. From an adversarial perspective, this vulnerability would likely map to attack techniques in the MITRE ATT&CK framework under the execution and privilege escalation domains, specifically targeting the use of valid accounts and exploitation of system vulnerabilities to achieve unauthorized code execution and persistent access within target environments.