CVE-2008-0587 in AIX
Summary
by MITRE
Buffer overflow in the uspchrp program in devices.chrp.base.diag in IBM AIX 5.2 and 5.3 allows local users to gain privileges via unspecified vectors.
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Analysis
by VulDB Data Team • 06/01/2025
The vulnerability identified as CVE-2008-0587 represents a critical buffer overflow flaw within the uspchrp program component of IBM AIX 5.2 and 5.3 operating systems. This issue resides within the devices.chrp.base.diag subsystem, which is responsible for system diagnostic functionality. The buffer overflow occurs when the uspchrp program processes input data without proper bounds checking, creating an exploitable condition that can be leveraged by local attackers to escalate privileges. The vulnerability specifically affects IBM AIX versions 5.2 and 5.3, which were widely deployed in enterprise environments during that timeframe. The unspecified vectors mentioned in the description indicate that multiple attack pathways may exist, making the vulnerability particularly concerning from a security perspective.
From a technical standpoint, this buffer overflow vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The uspchrp program likely handles user input through command line arguments or system calls without validating the length of data being processed. When input exceeds the allocated buffer size, it overflows into adjacent memory regions, potentially corrupting the stack frame or overwriting return addresses. This memory corruption can be exploited to redirect program execution flow, allowing local users to execute arbitrary code with elevated privileges. The diagnostic nature of the component suggests that the program may run with elevated permissions, amplifying the impact of privilege escalation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it represents a significant security weakness in enterprise computing environments. Local attackers who can access the system can leverage this flaw to gain root or administrative privileges, potentially leading to complete system compromise. The vulnerability affects systems that rely on IBM AIX for mission-critical operations, making it particularly dangerous in financial services, telecommunications, and government sectors where AIX was commonly deployed. The exploitation of such a vulnerability could result in unauthorized data access, system manipulation, and potential data breaches that could affect thousands of users. Organizations running these specific AIX versions face a heightened risk profile, as the vulnerability provides a clear path for attackers to move laterally within their networks and establish persistent access.
Mitigation strategies for CVE-2008-0587 should include immediate patching of affected IBM AIX systems through official IBM security updates. Organizations should also implement runtime protections such as stack canaries, address space layout randomization, and non-executable stack protections to reduce exploitability even if patches are not immediately available. The principle of least privilege should be enforced by limiting local user access to diagnostic programs and restricting the execution of uspchrp and similar system utilities. Network segmentation and monitoring should be enhanced to detect anomalous behavior that might indicate exploitation attempts. Additionally, security teams should conduct comprehensive vulnerability assessments to identify other potentially vulnerable components within the IBM AIX environment. Regular security audits and penetration testing should be performed to ensure that similar buffer overflow vulnerabilities are not present in other system components, as this type of flaw often indicates broader code quality issues. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting local accounts and system services, making it a critical focus area for enterprise security teams implementing comprehensive threat hunting strategies.