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Message-ID: <1b7fc2a05dbdd80e4e958375e33f8d73.squirrel@fbi.dhs.org> Date: Thu, 27 Oct 2011 10:20:16 -0400 (EDT) From: bugs@....dhs.org To: Valdis.Kletnieks@...edu Cc: full-disclosure@...ts.grok.org.uk Subject: Re: Symlink vulnerabilities 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.) > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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