CVE-2006-1136 in Copycentre C75
Summary
by MITRE
Buffer overflow in the PostScript file interpreter code for Xerox CopyCentre and Xerox WorkCentre Pro, running software 1.001.02.073 or earlier, or 1.001.02.074 before 1.001.02.715, allows attackers to cause a denial of service via unknown vectors.
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Analysis
by VulDB Data Team • 07/08/2021
The vulnerability identified as CVE-2006-1136 represents a critical buffer overflow flaw within the PostScript file interpreter component of Xerox CopyCentre and Xerox WorkCentre Pro devices. This security weakness affects specific software versions where the interpreter fails to properly validate input data when processing PostScript files, creating an exploitable condition that can be leveraged by malicious actors. The affected systems operate with firmware versions 1.001.02.073 or earlier, or versions 1.001.02.074 through 1.001.02.714, indicating a targeted scope within the Xerox product line that requires careful attention from security administrators and network operators.
The technical implementation of this buffer overflow occurs within the PostScript interpreter code that processes document files submitted to these multifunction devices. When a maliciously crafted PostScript file is processed, the interpreter does not perform adequate bounds checking on buffer allocations, allowing an attacker to overwrite adjacent memory locations. This memory corruption can occur through various input vectors including malformed PostScript commands, oversized data structures, or specially constructed file parameters that exceed the allocated buffer capacity. The vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking permits memory access beyond allocated boundaries, potentially leading to unpredictable system behavior.
The operational impact of this vulnerability manifests primarily as a denial of service condition that can effectively render the affected Xerox devices inoperable. Attackers can exploit this weakness to crash the device's interpreter process, causing the system to become unresponsive or require manual rebooting. In networked environments where these devices serve as print servers or document processing nodes, such an attack can disrupt business operations and create significant downtime. The vulnerability's exploitation may also potentially allow for privilege escalation or arbitrary code execution depending on the specific implementation details and system configuration, though the primary documented impact remains denial of service.
Mitigation strategies for CVE-2006-1136 should prioritize immediate firmware updates from Xerox to address the buffer overflow condition. Organizations should implement network segmentation to limit access to these devices and restrict PostScript file processing capabilities through printer access controls. Network monitoring should be enhanced to detect unusual print job patterns or file types that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation of software vulnerabilities for system compromise, making it essential for security teams to maintain updated threat intelligence and ensure proper patch management processes are in place. Additionally, implementing proper input validation and sanitization measures within the print queue systems can provide additional defense-in-depth layers against similar exploitation vectors.