CVE-2012-5535 in gnome-system-log
Summary
by MITRE
gnome-system-log polkit policy allows arbitrary files on the system to be read
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Analysis
by VulDB Data Team • 02/27/2024
The vulnerability identified as CVE-2012-5535 affects the gnome-system-log application, which is part of the GNOME desktop environment's system logging utilities. This issue stems from a flaw in the polkit policy configuration that governs how system log files are accessed and read. The vulnerability allows unauthorized users to potentially read arbitrary files on the system through improper privilege escalation mechanisms within the logging application.
The technical flaw lies in the insufficient access controls implemented within the polkit policy files that govern gnome-system-log's operations. When users interact with the system log viewer application, the underlying polkit configuration fails to properly validate file paths or restrict access to sensitive system locations. This misconfiguration enables attackers to manipulate the application's file reading capabilities beyond their intended scope, potentially allowing access to confidential system files, configuration data, or user information that should remain protected.
The operational impact of this vulnerability extends beyond simple information disclosure, as it represents a privilege escalation vector that could enable attackers to gather intelligence about the system's configuration, user accounts, and potentially sensitive data stored in log files. System administrators who rely on gnome-system-log for monitoring and troubleshooting may unknowingly expose system integrity through this flaw, as the application could be manipulated to read files that contain passwords, cryptographic keys, or other sensitive information typically protected by proper file permissions and access controls.
This vulnerability aligns with CWE-264, which describes permissions, privileges, and access control issues, and demonstrates how improper privilege management in desktop applications can create security risks. From an attack perspective, this flaw could be leveraged as part of a broader exploitation strategy, potentially serving as an initial foothold for more extensive system compromise. The ATT&CK framework categorizes this issue under privilege escalation techniques, specifically targeting the use of legitimate system tools to gain unauthorized access to system resources.
Mitigation strategies should focus on updating the affected gnome-system-log package to a version that properly implements access controls and polkit policies. System administrators should also conduct thorough reviews of all polkit policies within their desktop environments to ensure that applications do not inadvertently provide access to sensitive system resources. Additionally, implementing proper file permission controls and regular security audits of desktop applications can help prevent similar issues from arising in other system components. The vulnerability underscores the importance of proper privilege separation in desktop environments where applications may need elevated permissions for legitimate system functions while maintaining strict controls over what resources can be accessed.