NETRAGARD-20060624 SECURITY ADVISORY] [ROXIO TOAST 7 TITANIUM - LOCAL ROOT COMPROMISE ]

[Propaganda Support <support () propagandaprod com>]

Hello list members,

I don't consider this to be a legitimate exploit at all, since admin  
privileges are required to access the Deja Vu preference pane. (It's  
locked for standard users.) And, of course, any admin user on OS X  
can become root at any time:

% sudo su
Password:
godard:/tmp root# id
uid=0(root) gid=0(wheel) groups=0(wheel), 1(daemon), 2(kmem), 3(sys),  
4(tty), 29(certusers), 8(procview), 5(operator), 9(procmod), 80 
(admin), 20(staff)

The "attack" depends primarily on the ability to prepend /tmp to  
$PATH, as shown in this part of Step 2:

> netragard-test-1$export PATH=/tmp/:$PATH

Even if there is a malicious 'rm' program (for example) sitting  
inside of /tmp, the 'export' command can only change the $PATH  
environment variable to prepend /tmp within the current account  
(actually, only within the current shell session).

In other words, if the "attacker" already has an admin user name and  
password required to use Deja Vu, then they already have the means to  
become root at any time (see 'sudo su' above).

Kind Regards,
-jeff

--
Jeff Holland
http://propagandaprod.com



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