CVE-2007-3283 in Solaris
Summary
by MITRE
GNOME XScreenSaver in Sun Solaris 8 and 9 before 20070417, when root is logged into the console, does not automatically lock the screen after a session has been inactive, which might allow physically proximate attackers to access the console.
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Analysis
by VulDB Data Team • 07/20/2021
The vulnerability described in CVE-2007-3283 represents a critical security flaw in the GNOME XScreenSaver implementation within Sun Solaris 8 and 9 operating systems. This issue specifically affects systems where the root user maintains an active console session, creating a significant window of opportunity for unauthorized access. The vulnerability stems from the improper handling of session inactivity detection mechanisms within the XScreenSaver component, which is responsible for managing screen locking and user session security. When root is logged into the console, the system fails to automatically initiate the screen locking process after a period of user inactivity, leaving the system exposed to potential exploitation by attackers who are physically present near the workstation.
The technical root cause of this vulnerability lies in the failure of the GNOME XScreenSaver daemon to properly monitor and respond to session inactivity events when the root user is actively using the console interface. This flaw operates at the operating system level within the graphical user interface security framework, specifically affecting the X Window System's session management capabilities. The vulnerability is classified under CWE-613, which addresses insufficient session management, and represents a failure in the proper implementation of access control mechanisms for authenticated sessions. The XScreenSaver component, which should automatically lock the screen after a predetermined period of inactivity, fails to execute this critical security function when root is the active console user, creating a persistent security risk that can be exploited by attackers with physical proximity to the system.
The operational impact of this vulnerability is particularly severe given that it affects systems where root privileges are actively utilized, potentially allowing attackers to gain elevated privileges and execute malicious activities without requiring additional authentication. This vulnerability aligns with ATT&CK technique T1547.001, which covers registry run keys and startup folder, as the attack vector relies on physical access to exploit the lack of automatic screen locking. The security implications extend beyond simple unauthorized access, as an attacker who gains access to a root console session can potentially modify system configurations, install malicious software, access sensitive data, and compromise the entire system integrity. The vulnerability is especially dangerous in environments where security policies mandate strict access controls and where physical security measures are insufficient to prevent unauthorized access to workstations.
Mitigation strategies for this vulnerability should include immediate implementation of system patches provided by Sun Microsystems, which would address the specific screen locking implementation flaw in the GNOME XScreenSaver component. Organizations should also implement additional security controls such as enforcing automatic screen locking through alternative methods, configuring system-wide screen saver settings that override the vulnerable XScreenSaver behavior, and establishing strict physical security policies for systems where root access is required. The implementation of automated monitoring solutions that can detect and alert on systems where screen locking is not functioning properly provides an additional layer of defense. Security teams should also consider implementing mandatory session timeout policies that enforce screen locking regardless of the XScreenSaver component behavior, ensuring that even if the primary vulnerability exists, the system maintains adequate security posture. Regular security assessments and penetration testing should be conducted to verify that screen locking mechanisms function correctly across all user sessions, particularly those involving privileged accounts.