CVE-2008-0756 in Cyanprintip Professional
Summary
by MITRE
The LPD server in cyan soft Opium OPI Server 4.10.1028 and earlier; cyanPrintIP Easy OPI, Professional, and Basic 4.10.1030 and earlier; Workstation 4.10.836 and earlier; and Standard 4.10.940 and earlier; allows remote attackers to cause a denial of service (daemon crash) via a connection that begins with (1) a "Send queue state" LPD command 3 or (2) a "Send queue state" LPD command 4.
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Analysis
by VulDB Data Team • 01/08/2025
The vulnerability identified as CVE-2008-0756 represents a critical denial of service weakness affecting multiple cyan software products including Opium OPI Server and various cyanPrintIP editions. This flaw resides within the Line Printer Daemon (LPD) server implementation that handles print queue management operations. The vulnerability specifically targets the processing of LPD commands related to queue state information, creating a scenario where remote attackers can deliberately crash the daemon by establishing connections with malformed command sequences. The affected versions span across several product lines including server editions, workstation variants, and different print management solutions, indicating a widespread impact across the cyan software ecosystem.
The technical implementation of this vulnerability stems from inadequate input validation within the LPD server's command processing logic. When the server receives a connection containing either a "Send queue state" LPD command 3 or command 4, the parsing routine fails to properly handle the malformed input sequence. This parsing failure results in memory corruption or unexpected execution flow that ultimately leads to daemon termination. The flaw operates at the protocol level where the server does not adequately sanitize or validate the command parameters before processing them, creating a path for malicious input to trigger system instability. The vulnerability is particularly concerning because it requires no authentication or privileged access to exploit, making it accessible to any remote attacker with network connectivity to the affected services.
The operational impact of this vulnerability extends beyond simple service disruption as it can lead to complete system unavailability within print management environments. Organizations relying on these cyan software solutions for document processing and print queue management face significant operational risks when the daemon crashes, potentially affecting business continuity and workflow automation. The vulnerability's exploitability means that attackers can repeatedly trigger the denial of service condition, creating persistent service interruptions that may require manual intervention to restore normal operations. In enterprise environments where print services are critical for document handling, this vulnerability could result in substantial productivity losses and increased administrative overhead for system recovery.
Mitigation strategies for CVE-2008-0756 should focus on immediate patch deployment for all affected cyan software versions, with particular attention to the specific command processing routines within the LPD server implementation. Network segmentation and access controls should be implemented to limit exposure of affected services to untrusted networks, while firewall rules can be configured to restrict access to the LPD port 515. Additionally, monitoring systems should be enhanced to detect unusual connection patterns or repeated daemon crashes that may indicate exploitation attempts. From a security framework perspective, this vulnerability aligns with CWE-121 and CWE-122 categories related to buffer overflow conditions and memory corruption, while the remote attack vector places it within ATT&CK technique T1499.1 for network denial of service. Organizations should also consider implementing intrusion detection systems to monitor for the specific command sequences that trigger this vulnerability, and establish incident response procedures to quickly address daemon crashes and restore service availability.