J-Security Center

Title: Geeklog New User Default Admin Privileges Vulnerability

Severity: MODERATE

Description:

Geeklog is freely available, open-source weblog software. It allows users to create a virtual community area, complete with user administration, story posting, etc. It is written in PHP and will run on most Unix and Linux variants, as well as Microsoft Windows NT/2000. Geeklog is backended by MySQL.

A vulnerability has been discovered in Geeklog version 1.3 that may allow the unprivileged, regular user to sign onto the service to gain admin rights.

Geeklog 1.3 implements a Unix-style privilege model, allowing administration of users based on what group the user belongs to.

Due to an oversight in the design of Geeklog, the first new user to create an account with the service is a member of the GroupAdmin/UserAdmin Groups. This is because the fresh installation includes one group_assignments record with a user ID of 13. Normally the last default admin-privileged account would have a user ID of 12. The impact is that the first regular user is able to administrate both users and groups.

Affected Products:

  • Geeklog Geeklog 1.3.0

References:

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