Title: CDRDAO Home Directory Configuration File Symbolic Link Vulnerability
Severity: HIGH
Description:
CDRDAO is a freely available, open source CD recording software package available for the Unix and Linux Operating Systems. It is maintained by Andreas Mueller.
A problem with the software package could make it possible for local users to gain elevated privileges. The problem is in the creation of files by root.
When CDRDAO executes, it can be made to save the executing configuration to a file in the executing user's home directory. This file is typically saved as $HOME/.cdrdao. It is also reported that when CDRAO is run with the "unlock -save" arguments, the CDRDAO utility will create the aforementioned file.
When CDRDAO saves its configuration to the .cdrdao file in a user's home directory, the file is saved with root ownership. Additionally, CDRDAO does not check for the previous existence of this file. Since the CDRDAO executable is typically installed setuid root, it is possible for a user to create this file as a symbolic link, which could result in the overwriting of root-owned files, or potentially allow the user execute commands as root.
This problem could make it possible for a local user to corrupt root-owned files, or potentially gain elevated privileges, including administrative access.
Affected Products:
- CDRDAO CDRDAO 1.1.4
- CDRDAO CDRDAO 1.1.5
- CDRDAO CDRDAO 1.1.9
References:
- cdrdao: cdrdao 1.2.0 release notes
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