CVE-2002-0096 in Geeklog
Summary
by MITRE
The installation of Geeklog 1.3 creates an extra group_assignments record which is not properly deleted, which causes the first newly created user to be added to the GroupAdmin and UserAdmin groups, which could provide that user with administrative privileges that were not intended.
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Analysis
by VulDB Data Team • 05/12/2019
The vulnerability described in CVE-2002-0096 represents a critical access control flaw in the Geeklog content management system version 1.3. This issue stems from improper database cleanup during the installation process, specifically concerning group assignment records that are not correctly removed when the system is set up. The flaw manifests as an unintended persistence of administrative group membership assignments that should have been cleared during installation, creating a scenario where the initial user account created after installation automatically inherits elevated privileges.
The technical implementation of this vulnerability involves the database schema design and installation script execution within Geeklog 1.3. During the installation process, the system creates certain group assignments for administrative purposes, but fails to properly clean up these records when the installation is complete. This oversight results in the presence of a lingering group_assignments record that persists in the database. When the first new user account is created subsequent to this incomplete installation cleanup, the system erroneously associates this user with both the GroupAdmin and UserAdmin groups, effectively granting them administrative capabilities without proper authorization.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally compromises the security model of the content management system. An attacker who gains access to create a user account on a vulnerable Geeklog installation could automatically assume administrative responsibilities, potentially leading to complete system compromise. This vulnerability directly violates the principle of least privilege and represents a classic case of insecure initialization where the system's default state contains unintended access permissions. The flaw affects the system's integrity and authentication mechanisms, as it allows unauthorized users to bypass normal access control procedures.
This vulnerability aligns with CWE-276, which addresses improper permissions for privileges, and specifically demonstrates how improper initialization can lead to security flaws. The issue also relates to ATT&CK technique T1078.004, which covers legitimate credentials, as the vulnerability enables unauthorized users to gain administrative access through legitimate account creation processes. The problem stems from inadequate input validation and improper cleanup procedures during system installation, creating a persistent security weakness that remains active until the database is manually corrected. Organizations using Geeklog 1.3 should implement immediate remediation by manually removing the erroneous group assignments from the database and applying the appropriate security patches to prevent unauthorized privilege escalation.
The broader implications of this vulnerability highlight the importance of proper database cleanup and initialization procedures in web applications. System administrators must ensure that installation processes thoroughly clean up temporary or legacy records that could persist and create security risks. This flaw demonstrates how seemingly minor oversights in installation scripts can create persistent security weaknesses that affect the entire system's trust model. The vulnerability serves as a reminder of the critical need for comprehensive security testing during installation and configuration phases of software deployment.