Re: Symlink vulnerabilities

[bugs () fbi dhs org]

Hi,

I've gotten this exploit to work, albeit on a slow 500mhz system with
256mb of ram.  I've shared the details with vladz and will make them
available soon.  It's a hard race to win, but it can be won about 60% of
the time.

> On Fri, 28 Oct 2011 00:56:35 +1100, xD 0x41 said:
>
> > morning but, i trust you, itcannot be exploited, in any way, it will
> > only cause corruption of tar and compression utils, at most.
>
> Umm. Maybe in *that step* it's "at most". But what can you leverage
> that into?
>
> If you can screw with the code execution of the tar command
> enough to get root to untar a file of your choosing, you then have your
> entire rootkit installed with no further effort on your part. ;)
>
> (For a wonderful read on leveraging, find the tech writeup from a few
> years
> ago on how a 1-byte overlay in ntpd got leveraged into a total root pwn.)
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