CVE-2000-1064 in Jetdirect
Summary
by MITRE
Buffer overflow in the LPD service in HP JetDirect printer card Firmware x.08.20 and earlier allows remote attackers to cause a denial of service.
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Analysis
by VulDB Data Team • 05/28/2018
The vulnerability identified as CVE-2000-1064 represents a critical buffer overflow flaw within the Line Printer Daemon LPD service implemented in HP JetDirect printer card firmware versions 8.20 and earlier. This issue resides in the network printing service that enables remote printing capabilities through the Line Printer Daemon protocol, which was widely adopted in enterprise environments for managing printer queues and print jobs across networked systems. The LPD service operates on TCP port 515 and serves as a communication interface between print clients and printer devices, making it a prime target for exploitation in networked printing environments.
The technical flaw manifests when the LPD service processes incoming network requests without proper input validation or buffer size checking. Specifically, the firmware fails to adequately validate the length of incoming data packets, particularly those containing print job information or printer status queries. When a maliciously crafted packet exceeds the allocated buffer space, the overflow causes memory corruption that can lead to unpredictable behavior including service termination, system crashes, or in some cases, potential code execution. This vulnerability operates at the application layer of the network stack and leverages the inherent trust relationships within networked printing environments where devices typically accept and process requests from authorized clients without extensive validation.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially compromise entire printing infrastructures within organizations. Attackers can exploit this weakness to disrupt critical printing services, causing production delays, administrative overhead, and potential business disruption. In enterprise environments where multiple print servers and networked printers rely on LPD services, a successful exploitation could cascade across the network, affecting numerous print jobs and potentially creating opportunities for further reconnaissance. The vulnerability is particularly concerning because it affects firmware-level implementations that are often difficult to patch or update, especially in legacy systems where hardware replacement may be cost-prohibitive or administratively complex.
Organizations should implement immediate mitigations including network segmentation to isolate printer services from critical network segments, disabling unnecessary printing services where possible, and applying vendor-provided firmware updates as soon as they become available. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and demonstrates characteristics consistent with ATT&CK technique T1190 for exploitation of remote services. Network administrators should also consider implementing intrusion detection systems to monitor for anomalous LPD traffic patterns and establish robust patch management processes to ensure timely firmware updates. Additionally, organizations should review their printer security configurations and implement access controls to limit which systems can communicate with print services, reducing the attack surface for this and similar vulnerabilities.