CVE-2002-0742 in AIX
Summary
by MITRE
Buffer overflow in pioout on AIX 4.3.3.
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Analysis
by VulDB Data Team • 09/04/2019
The vulnerability identified as CVE-2002-0742 represents a critical buffer overflow flaw in the pioout utility component of AIX 4.3.3 operating systems. This issue resides within the system's print I/O output functionality and demonstrates a classic security weakness that can be exploited to execute arbitrary code or cause system instability. The buffer overflow occurs when the pioout utility processes input data without proper bounds checking, allowing attackers to overwrite adjacent memory locations and potentially gain unauthorized access to the system.
The technical implementation of this vulnerability stems from inadequate input validation within the pioout utility's memory management routines. When the utility receives print job data or command parameters, it fails to verify that input data fits within allocated buffer boundaries before copying or processing the information. This flaw creates a condition where maliciously crafted input can exceed the buffer capacity and overwrite critical system memory regions including return addresses, function pointers, or other control data structures. The vulnerability specifically affects AIX 4.3.3 systems and represents a weakness categorized under CWE-121, which addresses stack-based buffer overflow conditions that can lead to arbitrary code execution.
The operational impact of this vulnerability extends beyond simple system crashes or denial of service conditions. Attackers exploiting this buffer overflow can potentially execute arbitrary code with the privileges of the pioout process, which typically runs with elevated permissions in print subsystem contexts. This escalation could allow adversaries to install backdoors, modify system files, or establish persistent access to the compromised AIX system. The vulnerability also presents a significant risk to networked environments where print services are exposed to untrusted users or external networks, as the attack surface expands to include remote exploitation capabilities.
Organizations running AIX 4.3.3 systems should implement immediate mitigations to address this vulnerability. The primary recommendation involves applying the official IBM security patches released for this specific vulnerability, which typically include memory boundary checks and input validation enhancements. System administrators should also consider implementing network segmentation to limit access to print services and disable unnecessary print functionality where possible. Additionally, monitoring for suspicious print job submissions or unusual system behavior can help detect potential exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques involving buffer overflow exploitation and privilege escalation, making it a significant concern for organizations following the MITRE ATT&CK matrix for adversary behavior analysis and defensive strategy development.