CVE-2001-0594 in Solaris
Summary
by MITRE
kcms_configure as included with Solaris 7 and 8 allows a local attacker to gain additional privileges via a buffer overflow in a command line argument.
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Analysis
by VulDB Data Team • 01/05/2025
The vulnerability identified as CVE-2001-0594 resides within the kcms_configure utility distributed with Solaris 7 and 8 operating systems. This tool serves as a configuration utility for the kernel configuration management system and is designed to handle command line arguments for system configuration tasks. The flaw manifests as a classic buffer overflow vulnerability that occurs when the utility processes command line parameters without adequate bounds checking. When an attacker provides a specially crafted command line argument exceeding the allocated buffer size, the overflow can overwrite adjacent memory locations including return addresses and control data structures. This vulnerability represents a significant security risk as it allows local attackers to escalate their privileges from standard user level to root access, effectively bypassing the operating system's privilege separation mechanisms.
The technical implementation of this buffer overflow vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory. The kcms_configure utility fails to validate the length of command line arguments before copying them into fixed-size buffers, creating an exploitable condition that can be leveraged to execute arbitrary code with elevated privileges. The vulnerability specifically affects the command line argument processing functionality, where the utility uses unsafe string handling methods that do not perform proper input validation or buffer boundary checks. Attackers can exploit this by crafting command line arguments that exceed the buffer capacity, causing the program to overwrite memory in a predictable manner that can be manipulated to redirect program execution flow.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it represents a critical weakness in the Solaris operating system's security architecture. Local attackers who can execute commands on the system gain the ability to assume root privileges, which provides complete control over the affected system. This includes the ability to modify system files, install malicious software, create new user accounts, and access all system resources without restriction. The vulnerability is particularly concerning because it requires minimal privileges to exploit and can be triggered through normal command line usage of the kcms_configure utility. From an attacker's perspective, this represents a low-effort, high-impact attack vector that can be automated and does not require network connectivity or complex exploitation techniques. The vulnerability affects both Solaris 7 and 8 versions, indicating it was present across multiple releases and likely went undetected for extended periods.
Mitigation strategies for CVE-2001-0594 focus on immediate patching and system hardening measures. The most effective approach involves applying the official security patches provided by Sun Microsystems for Solaris 7 and 8 operating systems, which typically include buffer size validation and proper bounds checking implementations. System administrators should also implement privilege separation techniques, ensuring that the kcms_configure utility runs with minimal necessary privileges and that command line arguments are properly sanitized before processing. Network segmentation and access controls can help limit the potential impact by restricting local access to systems running vulnerable versions of Solaris. Additionally, monitoring systems should be configured to detect unusual command line argument patterns that might indicate exploitation attempts. From a defensive perspective, this vulnerability demonstrates the importance of input validation and proper bounds checking in system utilities, aligning with ATT&CK technique T1068 which covers privilege escalation through local exploits. Organizations should implement regular vulnerability assessments and maintain up-to-date security patches to prevent similar issues from affecting their systems. The vulnerability also highlights the need for secure coding practices and thorough code reviews to identify and prevent buffer overflow conditions in system utilities and applications.