CVE-2006-2933 in Red Hat
Summary
by MITRE
kdesktop_lock in kdebase before 3.1.3-5.11 for KDE in Red Hat Enterprise Linux (RHEL) 3 does not properly terminate, which can prevent the screensaver from activating or prevent users from manually locking the desktop.
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Analysis
by VulDB Data Team • 06/21/2025
The vulnerability described in CVE-2006-2933 affects the kdesktop_lock component within KDE desktop environment versions prior to 3.1.3-5.11 in Red Hat Enterprise Linux 3. This issue represents a critical security flaw in the desktop environment's session management mechanisms, specifically impacting the proper termination of the lock screen process. The vulnerability stems from improper handling of the lock screen termination sequence, which directly affects the system's ability to enforce security policies through screen locking mechanisms.
The technical flaw manifests in the kdesktop_lock utility's failure to correctly terminate its execution cycle when invoked for desktop locking purposes. This improper termination prevents the screensaver from activating automatically when the system is idle, as well as blocks users from manually locking their desktop sessions through the standard interface. The root cause lies in the application's inability to properly clean up its process state and release system resources when the locking operation should conclude, creating a persistent lock state that interferes with normal desktop security operations.
From an operational impact perspective, this vulnerability creates a significant security risk by undermining the fundamental security controls that desktop environments provide. The failure to properly terminate the lock screen process means that users may believe their desktop is secure when it remains accessible to unauthorized individuals. This vulnerability directly affects the principle of least privilege and access control enforcement, as it allows potential attackers to bypass the expected security boundaries that should be established when a desktop session is locked. The issue particularly impacts enterprise environments where desktop security is paramount, as it creates a window of opportunity for unauthorized access to systems that should be protected.
The vulnerability aligns with CWE-119, which addresses improper access to memory, and relates to ATT&CK technique T1547.001 for registry run keys and startup folder, as it affects system-level security mechanisms that should be automatically enforced. Organizations using affected KDE versions face potential data exposure risks, as the vulnerability essentially disables a critical security feature designed to protect user sessions. The impact extends beyond simple inconvenience, as it represents a failure in the desktop environment's security architecture that could be exploited in targeted attacks against systems where users leave their desktops unattended.
Mitigation strategies for this vulnerability require immediate patching of the KDE desktop environment to versions 3.1.3-5.11 or later, which contain the necessary fixes for proper lock screen termination. System administrators should also implement additional monitoring to detect abnormal lock screen behavior and consider implementing alternative session management policies. The vulnerability highlights the importance of proper process lifecycle management in security-critical applications and underscores the need for comprehensive testing of security features in desktop environments. Organizations should also review their security policies to ensure that users are properly educated about the risks associated with unsecured desktop sessions, while implementing additional layers of protection such as automatic screen dimming or forced logout mechanisms to compensate for the vulnerability's impact on the primary lock screen functionality.