CVE-2000-0210 in Workshop
Summary
by MITRE
The lit program in Sun Flex License Manager (FlexLM) follows symlinks, which allows local users to modify arbitrary files.
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Analysis
by VulDB Data Team • 01/18/2025
The CVE-2000-0210 vulnerability resides within the Sun Flex License Manager (FlexLM) software suite, specifically affecting the lit program component. This issue represents a classic path traversal flaw that exploits the improper handling of symbolic links during file operations. The vulnerability manifests when the lit program processes symbolic links without adequate validation, allowing unauthorized local users to manipulate file permissions and potentially gain elevated privileges. The flaw directly impacts the security model of FlexLM by undermining the integrity of file access controls and creating potential attack vectors for privilege escalation. This vulnerability is particularly concerning as it affects a license management system that often runs with elevated privileges to manage software licensing across enterprise networks.
The technical implementation of this vulnerability stems from the lit program's failure to properly resolve symbolic links before performing file operations. When a user creates or modifies symbolic links pointing to sensitive system files, the lit program follows these links without sufficient validation, effectively allowing access to files outside the intended directory structure. This behavior violates fundamental security principles of path resolution and file access control. The flaw operates at the operating system level where symbolic link resolution is not properly sandboxed or restricted, enabling attackers to bypass normal file system access controls through carefully crafted symlink manipulation. This vulnerability aligns with CWE-367, which describes the improper handling of symbolic links, and represents a clear violation of the principle of least privilege in system design.
The operational impact of CVE-2000-0210 extends beyond simple file modification capabilities and can enable more sophisticated attacks within compromised environments. Local users with access to the system can potentially modify critical system files, configuration data, or license files that control software usage rights. This vulnerability can be exploited to escalate privileges, modify license server configurations, or corrupt license management databases that may affect software availability and compliance. In enterprise environments where FlexLM is deployed for managing software licenses across multiple systems, this vulnerability creates a potential attack surface that could lead to unauthorized software usage or complete license server compromise. The attack vector is particularly dangerous because it requires minimal privileges and can be executed by any local user, making it an attractive target for both malicious insiders and external attackers who gain local access to systems running FlexLM.
Mitigation strategies for this vulnerability should focus on immediate system hardening and access control improvements. The most effective immediate solution involves implementing proper symbolic link validation within the lit program and ensuring that all file operations properly resolve paths before execution. System administrators should restrict write access to directories containing FlexLM components and implement proper file system permissions that prevent unauthorized symlink creation. The vulnerability demonstrates the importance of implementing the principle of least privilege and proper input validation in system components. Organizations should also consider updating to newer versions of FlexLM that address this specific vulnerability and implement monitoring solutions to detect unauthorized symlink creation attempts. Additionally, compliance with security standards such as those outlined in the NIST Cybersecurity Framework and ISO 27001 should include proper file system access controls and privilege management. The ATT&CK framework categorizes this as a privilege escalation technique through file system manipulation, emphasizing the need for robust access control mechanisms and proper path validation in system components.