CVE-2019-13201 in ECOSYS M5526cdw
Summary
by MITRE
Some Kyocera printers (such as the ECOSYS M5526cdw 2R7_2000.001.701) were affected by a buffer overflow vulnerability in the LPD service. This would allow an unauthenticated attacker to cause a Denial of Service (DoS) in the LPD service and potentially execute arbitrary code on the device.
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Analysis
by VulDB Data Team • 04/16/2024
The CVE-2019-13201 vulnerability represents a critical buffer overflow flaw discovered in Kyocera printer models including the ECOSYS M5526cdw, specifically within the Line Printer Daemon (LPD) service implementation. This vulnerability resides in the printer's network services that handle print job submissions from remote systems, making it particularly dangerous in enterprise environments where multiple devices are connected to shared networks. The LPD service operates on port 515 and is commonly used for print queue management in Unix-based systems, creating a direct pathway for exploitation when improperly configured or secured.
The technical exploitation of this vulnerability occurs through malformed input data sent to the LPD service, which fails to properly validate buffer boundaries during data processing. When an attacker sends specially crafted print jobs or network packets to the affected printer, the insufficient input validation causes the buffer to overflow, potentially overwriting adjacent memory locations. This memory corruption can lead to unpredictable behavior, including application crashes that result in denial of service conditions. According to CWE classification, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions that occur when insufficient bounds checking is performed on buffers.
The operational impact of CVE-2019-13201 extends beyond simple service disruption, as the vulnerability could potentially enable remote code execution on the affected devices. This capability stems from the memory corruption that allows attackers to manipulate program execution flow, potentially injecting malicious code into the printer's operating system. In a networked environment, this could provide attackers with persistent access points to internal networks, as printers often maintain connectivity to multiple network segments and may have access to sensitive data flows. The vulnerability particularly affects environments where printers are not properly segmented or where default configurations are maintained, creating attack vectors that align with ATT&CK technique T1072 for Application Deployment Software, where adversaries establish persistent access through networked devices.
Mitigation strategies for this vulnerability should focus on immediate patching of affected firmware versions, as Kyocera released updates addressing the buffer overflow conditions. Network segmentation of printer devices can help limit the scope of potential exploitation, while implementing firewall rules to restrict access to port 515 can prevent unauthorized remote access. Additionally, disabling unnecessary services and implementing proper input validation controls on network devices can reduce the attack surface. Organizations should also consider monitoring network traffic for unusual patterns related to printer services and implementing intrusion detection systems to identify potential exploitation attempts. The vulnerability highlights the importance of securing Internet of Things devices and networked peripherals, which often receive less attention in traditional security assessments but can serve as critical entry points for broader network compromises.