CVE-2003-1524 in PGPDisk
Summary
by MITRE
PGPi PGPDisk 6.0.2i does not unmount a PGP partition when the switch user function in Windows XP is used, which could allow local users to access data on another user s PGP partition.
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Analysis
by VulDB Data Team • 07/13/2025
This vulnerability exists in PGPi PGPDisk 6.0.2i software where the application fails to properly unmount encrypted partitions when users switch between accounts in Windows XP operating system. The flaw stems from inadequate session management during user switching operations, creating a persistent security boundary violation. When a user switches to another account using the standard Windows XP switch user functionality, the PGP partition remains mounted and accessible to the newly logged-in user, effectively bypassing the encryption protection mechanisms that should isolate data between different user sessions. This represents a critical failure in access control implementation where the software does not properly enforce user context boundaries.
The technical nature of this vulnerability can be categorized under CWE-284, which addresses improper access control, specifically concerning inadequate privilege management during multi-user scenarios. The flaw manifests as a failure to implement proper resource cleanup and access revocation when transitioning between user sessions, allowing unauthorized data access through the persistence of mounted encrypted volumes. This behavior violates fundamental security principles of isolation and mandatory access control, where each user should have exclusive access to their own encrypted data and no access to other users' encrypted partitions. The vulnerability is particularly concerning because it operates at the operating system level integration point where Windows XP's user switching mechanism interacts with third-party encryption software.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential corporate data breaches and compliance violations. Local users can gain unauthorized access to sensitive information that was intended to be protected within another user's encrypted partition, potentially exposing confidential business data, personal information, or proprietary materials. This creates a significant risk for organizations using PGPi PGPDisk in environments where multiple users share the same physical system, as it undermines the core security promise of encryption. The vulnerability essentially creates a backdoor access mechanism that persists across user sessions, making it particularly dangerous in shared computing environments or multi-user systems.
Mitigation strategies should focus on immediate software updates from the vendor to address the session management flaw, alongside operational controls such as disabling the switch user functionality in security-sensitive environments. Organizations should implement additional monitoring to detect unauthorized access patterns and consider alternative encryption solutions that properly handle multi-user scenarios. The vulnerability highlights the importance of proper session management and resource cleanup in security software implementations, particularly when integrating with operating system user management features. System administrators should also consider implementing additional access controls through group policies and ensure that users understand the risks associated with using shared systems with encryption software that does not properly handle user context switching. This vulnerability demonstrates the critical need for security software to properly integrate with operating system security models rather than creating isolated security boundaries that can be easily bypassed.