CVE-2007-5764 in AIX
Summary
by MITRE
Buffer overflow in the pioout program in printers.rte in IBM AIX 5.2, 5.3, and 6.1 allows local users to gain privileges via a long command line option.
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Analysis
by VulDB Data Team • 06/02/2025
The vulnerability described in CVE-2007-5764 represents a critical buffer overflow flaw within the pioout program component of IBM AIX operating systems across versions 5.2, 5.3, and 6.1. This issue specifically affects the printers.rte package which handles printer queue management and communication within the AIX environment. The vulnerability manifests when the pioout program processes command line arguments without proper bounds checking, creating an exploitable condition that can be leveraged by local attackers to execute arbitrary code with elevated privileges.
The technical implementation of this vulnerability stems from inadequate input validation within the pioout program's argument parsing mechanism. When users provide excessively long command line options to the program, the buffer allocated for storing these arguments becomes insufficient to accommodate the input data. This classic buffer overflow condition allows an attacker to overwrite adjacent memory locations, potentially including return addresses, function pointers, or other critical control data structures. The flaw is particularly concerning because it operates within a privileged context, as the pioout program typically runs with elevated permissions necessary for printer queue operations, making successful exploitation directly translate into privilege escalation capabilities.
The operational impact of this vulnerability extends beyond simple local privilege escalation, as it provides attackers with a potential pathway to establish persistent access within AIX systems. Attackers can leverage this vulnerability to execute malicious code with the privileges of the pioout program, which often runs with system-level permissions required for printer management operations. This could enable unauthorized users to modify printer configurations, access sensitive print queues, or potentially use the compromised system as a launching point for further attacks within the network infrastructure. The vulnerability affects systems where the printers.rte package is installed and actively used, making it particularly relevant for enterprise environments that rely heavily on AIX for their computing infrastructure.
Security mitigations for this vulnerability should focus on immediate patch application from IBM, as the manufacturer would have released specific fixes addressing the buffer overflow condition in the pioout program. System administrators should also implement additional security controls such as restricting local access to systems running affected AIX versions, monitoring for unusual command line argument patterns, and ensuring proper privilege separation within printer queue management processes. Organizations should consider implementing the principle of least privilege for printer-related services and regularly audit printer queue configurations to prevent unauthorized modifications. The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions where insufficient bounds checking allows attackers to overwrite memory locations, and may be mapped to ATT&CK technique T1068, which covers local privilege escalation through exploitation of system vulnerabilities. Given the nature of the flaw, it is essential that system administrators conduct thorough vulnerability assessments and implement proper access controls to prevent unauthorized local users from exploiting this condition.