CVE-2008-0509 in AIX
Summary
by MITRE
Multiple buffer overflows in IBM AIX 4.3 allow remote attackers to cause a denial of service (crash) or possibly gain privileges via a long argument to (1) piox25, related to piox25.c; or (2) piox25remote, related to piox25remote.sh.
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Analysis
by VulDB Data Team • 04/11/2019
The vulnerability identified as CVE-2008-0509 represents a critical security flaw affecting IBM AIX 4.3 systems, specifically targeting the piox25 and piox25remote utilities. This vulnerability stems from inadequate input validation mechanisms within these system components, creating exploitable buffer overflow conditions that can be remotely triggered by malicious actors. The affected utilities are part of IBM's AIX operating system, which is commonly deployed in enterprise environments for mission-critical applications and services. The buffer overflow conditions occur when these utilities process command-line arguments without proper bounds checking, allowing attackers to exceed allocated memory buffers and potentially execute arbitrary code or cause system instability.
The technical implementation of this vulnerability manifests through two distinct attack vectors that leverage different aspects of the affected software. The first vector targets the piox25 utility through the piox25.c source file, where a buffer overflow occurs when processing excessively long arguments passed to the program. The second vector operates through the piox25remote.sh script, which similarly fails to validate input length before processing user-supplied arguments. Both attack scenarios demonstrate the classic buffer overflow pattern where insufficient input validation allows attackers to overwrite adjacent memory locations, potentially leading to stack corruption and arbitrary code execution. According to CWE classification, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. The attack vectors align with ATT&CK techniques such as T1059.001 for command and scripting interpreter and T1499.004 for network denial of service, demonstrating how this vulnerability can be exploited for both service disruption and privilege escalation.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as the potential for privilege escalation creates serious security implications for affected systems. When exploited successfully, these buffer overflows could allow remote attackers to execute code with elevated privileges, potentially compromising the entire system and enabling further lateral movement within network environments. The vulnerability affects systems running IBM AIX 4.3, which represents a legacy operating system version that may still be present in enterprise environments where system upgrades have not been completed. Organizations utilizing these systems face significant risk of unauthorized access and system compromise, particularly given the remote exploitability of the vulnerability. The impact is compounded by the fact that these utilities are typically part of core system functionality, making the exploitation consequences more severe and potentially affecting critical business operations.
Mitigation strategies for CVE-2008-0509 should prioritize immediate system hardening and patch management activities. The most effective approach involves applying the official IBM security patches and updates that address the buffer overflow conditions in both piox25 and piox25remote components. System administrators should also implement input validation measures at the application level, ensuring that all command-line arguments are properly bounded before processing. Network segmentation and access controls should be enforced to limit exposure of vulnerable systems to untrusted networks. Additionally, monitoring systems should be configured to detect anomalous argument patterns that might indicate exploitation attempts. The vulnerability highlights the importance of maintaining current security patches and conducting regular vulnerability assessments, as the exploitation of legacy vulnerabilities remains a significant threat vector in enterprise environments. Organizations should also consider implementing application whitelisting policies to restrict execution of potentially vulnerable utilities and reduce the attack surface. According to industry best practices and security frameworks, this vulnerability underscores the necessity of proper input validation and memory safety practices in system development and maintenance, aligning with security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines.