CVE-2000-0229 in gpm
Summary
by MITRE
gpm-root in the gpm package does not properly drop privileges, which allows local users to gain privileges by starting a utility from gpm-root.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2000-0229 resides within the gpm package, specifically affecting the gpm-root utility component. This issue represents a critical privilege escalation flaw that undermines the fundamental security model of the system. The gpm package, which stands for General Purpose Mouse, is designed to provide mouse support for console environments and typically operates with elevated privileges to access hardware directly. The gpm-root utility serves as a helper component that requires root access to perform essential system functions while managing mouse input devices within the console interface.
The technical flaw manifests in the improper privilege dropping mechanism within the gpm-root utility implementation. When this utility executes, it fails to correctly relinquish root privileges that were initially required for its operation. This design oversight creates a persistent security vulnerability where local users can exploit the utility's elevated status to execute arbitrary commands with root privileges. The flaw directly violates the principle of least privilege, a core security tenet that mandates applications should operate with the minimum necessary permissions to fulfill their intended functions. The vulnerability operates through a privilege escalation vector where the local user can manipulate the utility's execution environment to gain unauthorized administrative access.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating a significant attack surface for local adversaries. An attacker with access to a system running vulnerable gpm installations can leverage this flaw to execute malicious code with root privileges, potentially leading to complete system compromise. This vulnerability is particularly dangerous in multi-user environments where local access might be available to untrusted users. The attack requires minimal prerequisites since the utility is typically installed and accessible by default, making exploitation straightforward for any local user who understands the system's privilege structure.
Mitigation strategies for CVE-2000-0229 focus on addressing the root cause through proper privilege management implementation. System administrators should immediately update to patched versions of the gpm package where the privilege dropping mechanism has been corrected. The fix typically involves implementing proper setuid/setgid handling that ensures the utility drops root privileges immediately upon initialization and reverts to the appropriate user context before performing any operations. Security best practices recommend that all setuid programs should follow strict privilege management protocols, as outlined in the CWE-276 standard for improper privilege management. Organizations should also consider implementing additional security controls such as file integrity monitoring and privilege escalation detection mechanisms to identify and prevent exploitation attempts. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the use of compromised system utilities to gain elevated access rights. Regular security audits should verify that all system utilities properly implement privilege dropping mechanisms, as this vulnerability demonstrates the critical importance of proper access control implementation in system-level software components.