CVE-2001-0067 in J-Pilot
Summary
by MITRE
The installation of J-Pilot creates the .jpilot directory with the user s umask, which could allow local attackers to read other users PalmOS backup information if their umasks are not securely set.
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Analysis
by VulDB Data Team • 04/30/2019
The vulnerability described in CVE-2001-0067 pertains to the J-Pilot application, a tool used for synchronizing data between PalmOS devices and Linux systems. This flaw represents a classic privilege escalation and information disclosure issue that exploits the default file creation permissions within the application's installation process. The vulnerability occurs during the initial setup phase when J-Pilot creates a hidden directory named .jpilot in each user's home directory. The application utilizes the user's current umask setting to determine the permissions for this directory, which can lead to significant security implications when users have permissive umask values.
The technical nature of this vulnerability stems from the improper handling of file system permissions during application installation. When J-Pilot creates the .jpilot directory, it inherits the umask settings from the executing user, which can result in overly permissive access controls. The umask value acts as a filter that determines the default permissions for newly created files and directories, and when set to insecure values such as 022 or 027, the directory may be created with world-readable or group-readable permissions. This behavior directly violates the principle of least privilege and creates opportunities for unauthorized access to sensitive PalmOS backup data. The vulnerability is classified under CWE-732: Incorrect Permission Assignment for Critical Resource, which specifically addresses situations where applications fail to properly set security-relevant file permissions.
The operational impact of this vulnerability is particularly concerning in multi-user environments where different users may have varying security practices and umask configurations. Local attackers who can identify other users' umask settings can exploit this weakness to gain access to PalmOS backup information, including contacts, calendar entries, and other personal data stored on the PalmOS device. This type of information disclosure can lead to privacy violations, identity theft, and potential compromise of sensitive business data when organizations use PalmOS devices for corporate communication. The vulnerability affects the confidentiality aspect of the CIA triad and can be categorized under the MITRE ATT&CK framework as part of the privilege escalation and credential access tactics. The attack surface expands when considering that users may not be security-aware and could inadvertently set permissive umask values during their system configuration processes.
The mitigation strategies for this vulnerability involve both immediate and long-term solutions. The most effective immediate fix is for the J-Pilot developers to implement explicit permission setting for the .jpilot directory, ensuring that it is created with restrictive permissions regardless of the user's umask setting. This approach aligns with security best practices and addresses the root cause rather than relying on user behavior. Users should also be educated about proper umask configuration and the importance of setting secure umask values, typically 077 or 027, to prevent unauthorized access to their files. System administrators can implement monitoring solutions to detect when users create directories with insecure permissions, and security policies should mandate secure default configurations for all applications. Additionally, the vulnerability demonstrates the importance of following secure coding practices, particularly in applications that handle sensitive user data, and emphasizes the need for proper access control mechanisms to prevent unauthorized information disclosure in multi-user environments.