CVE-2000-0363 in Linux
Summary
by MITRE
Linux cdwtools 093 and earlier allows local users to gain root privileges via the /tmp directory.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 04/19/2026
The vulnerability described in CVE-2000-0363 represents a privilege escalation flaw within the Linux cdwtools package version 093 and earlier. This issue specifically targets the handling of temporary files during the execution of the cdwtools utility, creating a path for local attackers to elevate their privileges to root level. The vulnerability stems from improper file handling mechanisms that fail to adequately secure temporary directories used during program execution. The root cause of this vulnerability can be categorized under CWE-377, which addresses insecure temporary file creation practices, and CWE-276, dealing with insecure file permissions. Attackers exploit this weakness by manipulating the /tmp directory to place malicious files that will be executed with elevated privileges when the cdwtools utility runs with root permissions.
The technical implementation of this privilege escalation involves the exploitation of a race condition or insecure temporary file creation mechanism within cdwtools. When the utility executes, it creates or modifies files in the /tmp directory without proper security controls or validation of file ownership and permissions. Local users can leverage this by creating symbolic links or replacing existing temporary files with malicious content that gets executed with root privileges. This type of vulnerability aligns with ATT&CK technique T1068, which covers privilege escalation through local exploitation of software vulnerabilities. The flaw specifically manifests when cdwtools performs operations that require elevated permissions, creating a window where temporary files can be manipulated by unprivileged users.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with complete system control and access to all resources available to the root user. This includes the ability to modify system files, install backdoors, access sensitive data, and potentially compromise the entire system. The vulnerability affects all systems running cdwtools versions 093 or earlier, making it particularly concerning for environments where this utility is commonly deployed. The exploitation requires local access to the system, which means attackers typically need to have some initial foothold, but once exploited, the consequences are severe. Organizations may face unauthorized system modifications, data breaches, and potential lateral movement opportunities through the elevated privileges gained from this vulnerability.
Mitigation strategies for CVE-2000-0363 primarily involve updating to a patched version of cdwtools that properly handles temporary file creation and security. System administrators should immediately upgrade to cdwtools version 094 or later, which addresses the insecure temporary file handling mechanisms. Additionally, implementing proper file permissions and ownership controls for the /tmp directory can help reduce the attack surface. Security hardening measures should include setting appropriate permissions on temporary directories, ensuring that only authorized users can create or modify files in these locations. The use of secure temporary file creation functions and proper validation of file paths can prevent attackers from manipulating temporary files. Organizations should also consider implementing monitoring and alerting for suspicious file creation activities in temporary directories. System administrators should regularly audit installed software packages and ensure that all security patches are applied promptly to prevent exploitation of known vulnerabilities. This vulnerability highlights the importance of secure coding practices and proper file handling mechanisms in system utilities that operate with elevated privileges.