CVE-2008-3571 in Phaser
Summary
by MITRE
The Xerox Phaser 8400 allows remote attackers to cause a denial of service (reboot) via an empty UDP packet to port 1900.
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Analysis
by VulDB Data Team • 11/03/2024
The vulnerability identified as CVE-2008-3571 affects Xerox Phaser 8400 multifunction devices and represents a significant denial of service weakness in network services. This flaw resides in the device's handling of Universal Datagram Protocol packets on port 1900, which is commonly used for Simple Service Discovery Protocol communications. The vulnerability allows remote attackers to exploit the device's network stack by sending specially crafted empty UDP packets, resulting in unexpected device reboot cycles that disrupt legitimate network operations and user access to printing services.
The technical nature of this vulnerability stems from inadequate input validation within the device's network processing routines. When the Phaser 8400 receives an empty UDP packet on port 1900, the device fails to properly handle this malformed input, leading to a system crash or unexpected reboot condition. This represents a classic buffer over-read or improper state handling vulnerability where the device does not implement proper bounds checking or error recovery mechanisms for incoming network traffic. The flaw operates at the network protocol level, making it particularly dangerous as it can be exploited without requiring authentication or specialized knowledge of the device's internal workings. This weakness aligns with CWE-122, which describes buffer overflow conditions, and CWE-248, which covers unspecified other flaws in software that can lead to system instability.
The operational impact of this vulnerability extends beyond simple service disruption to create significant business continuity challenges for organizations relying on these printing devices. When exploited, the remote reboot capability can lead to extended downtime for critical printing services, potentially affecting document workflows, administrative functions, and user productivity. Network administrators may experience difficulty in maintaining consistent service availability, particularly in environments where these devices are integrated into larger printing infrastructures. The vulnerability's remote exploitability means that attackers can target devices from anywhere on the network, making it particularly dangerous in unsecured network environments. This flaw also represents a potential vector for broader network disruption, as repeated exploitation can cause persistent service interruptions that may require manual intervention to resolve, potentially leading to increased operational costs and reduced system reliability.
Mitigation strategies for this vulnerability should focus on network-level protections and device configuration adjustments. Organizations should implement firewall rules to restrict access to port 1900 from untrusted networks, effectively blocking the attack vector while maintaining legitimate service functionality. Network segmentation and access control measures can help prevent unauthorized access to these devices, reducing the attack surface available to potential attackers. Device firmware updates from Xerox should be applied immediately to address the underlying software flaw, though legacy devices may require replacement if vendor support has been discontinued. Network monitoring solutions should be deployed to detect anomalous UDP traffic patterns on port 1900, enabling rapid identification and response to potential exploitation attempts. Additionally, implementing intrusion detection systems that can identify and alert on malformed UDP packets may provide early warning capabilities for this specific vulnerability, aligning with ATT&CK technique T1499.002 for network disruption attacks and supporting defensive measures outlined in the MITRE ATT&CK framework for network service disruption threats.