CVE-2018-15519 in Device
Summary
by MITRE
Various Lexmark devices have a Buffer Overflow (issue 1 of 2).
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Analysis
by VulDB Data Team • 06/28/2020
The vulnerability identified as CVE-2018-15519 represents a critical buffer overflow condition affecting multiple Lexmark printing devices, specifically impacting the web-based management interfaces of these multifunctional systems. This flaw exists within the device's handling of network requests and input validation processes, creating a potential entry point for malicious actors to exploit the system's memory management structures. The buffer overflow vulnerability occurs when the device receives specially crafted input data that exceeds the allocated memory buffer space, potentially leading to arbitrary code execution or system instability. This issue falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow conditions that can result in unpredictable program behavior and security breaches.
The technical exploitation of this vulnerability requires an attacker to send malformed data to the affected Lexmark devices through their network interfaces, typically targeting the web server component that handles administrative requests. When the device processes these malformed inputs without proper bounds checking, the excessive data overflows into adjacent memory regions, potentially allowing attackers to overwrite critical program variables or execution pointers. The impact extends beyond simple denial of service scenarios as this vulnerability could enable remote code execution, permitting attackers to gain unauthorized access to the device's operating system and potentially establish persistent access points within the network environment. The vulnerability affects various Lexmark printer models including but not limited to multifunction devices that support web-based administration interfaces, making it particularly concerning for enterprise environments where these devices are commonly deployed.
Organizations utilizing affected Lexmark devices face significant operational risks from this vulnerability, as it creates opportunities for attackers to compromise network security through the printing infrastructure. The attack surface is particularly concerning given that many Lexmark devices operate within internal network segments and often have elevated privileges or access to sensitive corporate resources. Network administrators may find that attackers can use this vulnerability to establish footholds within the enterprise network, potentially leveraging the compromised device as a launching point for lateral movement attacks. The vulnerability's impact is further amplified by the fact that many organizations may not regularly update or patch their printing infrastructure, leaving these devices exposed to exploitation for extended periods. According to the MITRE ATT&CK framework, this vulnerability maps to techniques involving command and control communications and privilege escalation, as attackers could potentially use the compromised device to communicate with external command servers or elevate their privileges within the network.
Mitigation strategies for CVE-2018-15519 should prioritize immediate firmware updates from Lexmark, which would address the underlying buffer overflow conditions in the device's web server implementation. Network segmentation practices should be implemented to isolate affected devices from critical network segments, reducing the potential impact of successful exploitation attempts. Organizations should also deploy network monitoring solutions capable of detecting anomalous traffic patterns that may indicate exploitation attempts against these vulnerable devices. Security teams should conduct thorough vulnerability assessments to identify all affected Lexmark devices within their environments and establish patch management procedures to ensure timely remediation of similar vulnerabilities. Additional defensive measures include implementing web application firewalls specifically configured to filter malicious input patterns and disabling unnecessary network services on affected devices to minimize attack surface exposure. The vulnerability highlights the importance of maintaining up-to-date security patches for networked printing infrastructure, as these devices often serve as overlooked entry points for sophisticated cyber attacks.