Title: CHUID Upload Directory Escaping File Owner Changing Vulnerability
Severity: HIGH
Description:
chuid is a freely available, open source user id changing utility. It was written and is maintained by Scott Parish. It is designed for use on the Linux operating system.
A problem with chuid could make it possible for a remote user to change the ownership of arbitrary files. The problem is in the handling of the dot-dot-slash directive.
The chuid utility is used to change the ownership of files uploaded to a server. Files uploaded to a predesignated directory can be changed to a specified user or group membership.
Due to insufficient sanitization of user input, it is possible for a remote user to pass the name of a file outside of the predesignated ownership changing directory. This could allow a remote user to change the ownership or group membership of a restricted or privileged file.
This problem makes it possible for a remote user to change the ownership and/or group membership of an arbitrary file, and could lead to elevated privileges.
Affected Products:
- chuid chuid 1.0.0
- chuid chuid 1.1.0
- chuid chuid 1.2.0
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