full-disclosure - (no subject)

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From: simon at snosoft.com (ATD)
Subject: (no subject)

Hrm,
	When I read this I see the key phrase "for the vulnerable daemon". If a
firewall is forwarding traffic from the internet to an internal system,
to a vulnerable daemon on that system, then file transfers are the least
of your worries. 



On Tue, 2003-02-04 at 11:41, bugtraq@...inc.com wrote:
> So, really you didnt find a way to bypass every firewall you found a way to
> upload/download files on a remote system. I have seen something like this
> before.
> 
> alt
> 
> Date: Tue, 4 Feb 2003 01:58:44 -0300
> From: ^Shadown^ <shadown@...iloche.com.ar>
> To: full-disclosure@...ts.netsys.com
> Subject: [Full-Disclosure] re: Global HIGH Security Risk
> 
> Dear Folks,
> 
>          I've set up a server behind a fw (ipchains) without gcc, with a
> vulnerable daemon,
>         the fw was set up just to allow the server to go through out by the
> binded daemon
>         port only.
>         What I did first was just to code an exploit for the vulnerable
> daemon and added a
>         simple command sequence to write down to the server an uuencoded
> file using vi
>         editor, then uudecode it and un-tar.gz and that way could upload
> binary files
>         (which could be tools, sniffers, local exploits, etc). That way I
> could upload
>         binary to execute on the remote server. But I've wanted to download
> files too (text
>         and binaries) so I've coded a sniffer which listens for a specific
> ID-secuence to
>         start/stop dumping to a file. And coded a tool to send the ID-
> secuence and the file
>         to the sniffer. All this worked right.
>         Then I removed all the programas that could be used as an text
> editor (joe, vim,
>         cat, ed, etc), uudecode/uuencode, and compressing file tools.
>         And I began to develop a technique which may be apply in any
> exploit code.
>         It could be done many ways. Every coder is gonna do it it's own
> way, but I did it
>         mine.
>         I've coded an exploit with few options -f file_to_upload -s
> spawn_shell.
>         The exploit sends diferent encrypted shellcodes depending the
> options.
>         A shellcode sends and writes down to /tmp the file which firstly
> was fragmented by
>         the exploit to be inserted into the multi shellcode sequence.(-f)
>         The other is a standard shellcode.
>         As simple as this, so you can upload and download any file type,
> and executed on
>         the remote server.
>         I think this explains the idea.
>         I wish to post the PoC, but don't wanna get in trouble.
>         Cheers,
>                 ^Shadown^
> 
>         my pgp key:
> 
>         -----BEGIN PGP PUBLIC KEY BLOCK-----
>         Version: PGPfreeware 5.0i for non-commercial use
> 
>         mQGiBDewdE4RBADwVP96nauXxbvLNENeZYrvDVF+L59UygAFN5GyUOlMWKLOCJYX
>         ETlwkSHdhJ4yK+QXHdT7fVIxFSbUbPA2W1qRg070XGFXZUyd8KzIHRpYXxTfQ4Z9
>         T8Gy3Ah/Q3ug7ka1mSv+u0s2TLc/zzpn2avlqHDMe9LnNhb/dQuOyxhqHwCg/1PR
>         wkqWQ6VhvOVr/2WLRHAtQk0D/i0FyzXs4kXudugwi3Wa19yXR3NeJrNTRBYH4Ewe
>         1G8OCLSKA2i03h0coU9pnvrqSdmXaH3YveZcFyq8BLLPZR0t8CZOLoim2wn8HuSC
>         rfRR+dLdyGic6Yzkz9xlXIpY8lkW0DFfv2dwgRmU3Uw7vFWYc+cKhhNRQXvIOPBE
>         b+2LA/0bY6axVCqrgBcIxBdsShQQTCb46koc5/h7p4WuOZJsouhfa/TH2Ao2v5Kg
>         zYipelHJt3NG2cX+tVWrlCLI++GMrTDdhfpQnzphXmrY8TdDZdLJnoIo4dZNL4XP
>         nxC5J7s6d+gpiT3JU8Z/v7jXxDLAY9OHm58sfLNjA72uJR49NLQkXlNoYWRvd25e
>         IDxTaGFkb3duQGJhcmlsb2NoZS5jb20uYXI+iQBOBBARAgAOBQI3sHROBAsDAgEC
>         GQEACgkQYbpiyBSkmBV5uACg5vp2HtkVBLb/DZ1vfNor4zkydPYAnAp3713OS/yQ
>         uVKqOQEt+KR0uwUKuQINBDewdE4QCAD2Qle3CH8IF3KiutapQvMF6PlTETlPtvFu
>         uUs4INoBp1ajFOmPQFXz0AfGy0OplK33TGSGSfgMg71l6RfUodNQ+PVZX9x2Uk89
>         PY3bzpnhV5JZzf24rnRPxfx2vIPFRzBhznzJZv8V+bv9kV7HAarTW56NoKVyOtQa
>         8L9GAFgr5fSI/VhOSdvNILSd5JEHNmszbDgNRR0PfIizHHxbLY7288kjwEPwpVsY
>         jY67VYy4XTjTNP18F1dDox0YbN4zISy1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6
>         ypUM2Zafq9AKUJsCRtMIPWakXUGfnHy9iUsiGSa6q6Jew1XpMgs7AAICB/9ZMU/n
>         2QMvtMWRp+o3N8hJXRMzfBWK/Uuq3+ena8VGrHXyoA/9QTNbTCaJTaEUSqtjRBYn
>         SOJlb9cfvlV5uwNFJYLv4ZHDXGv0TwNZbMjYCL4dWZOY/yaKFg0Ut48iOcyL0bPj
>         Grn8BrA0odpQXqAhJb7kNlR9iAcQiHzjvbTrF2XwXPknvyhXU5fwl+5LUbaZqNhE
>         FAA1sFktniOXgYshPqIGtZfQXdHdKl2Zd/K2cnuIAffFKDiHtlfvH4kLs9h5SlSt
>         cZfXodl+TxcEoELI9dke+HmUuJYqVCRN03znfIIUnDVlc5CyZYMlF/bwGAXwcVei
>         +1qLyWnJOadmoa6miQBGBBgRAgAGBQI3sHROAAoJEGG6YsgUpJgV/LYAnjQ7sSin
>         FSdirJmF4F/DCd/8GisYAKCFkOPu67W5Tug8ixlRKFwBIyEdzg==
>         =i8Hu
>         -----END PGP PUBLIC KEY BLOCK-----
> 
> 
> 
> 
> 
> 
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.netsys.com/full-disclosure-charter.html
-- 
ATD <simon@...soft.com>
Secure Network Operations, Inc.
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