Re: CVE request for wget

[Andreas Stieger <astieger () suse com>]

Hello,

On 09/07/2015 10:39 PM, Austin English wrote:
> This was reported to tails-dev [1] and other places [2] and is fixed
> upstream [3].
>
> I've rebased the patch for 1.13.4 (attached), which is the current
> version in Debian wheezy [4] that Tails is based on.
>
> Please keep me in CC, as I'm not subscribed.
>
> [1] https://mailman.boum.org/pipermail/tails-dev/2015-August/009370.html
> [2] https://lists.gnu.org/archive/html/bug-wget/2015-08/msg00020.html
> [3] http://git.savannah.gnu.org/cgit/wget.git/commit/?id=075d7556964f5a871a73c22ac4b69f5361295099
> [4] https://packages.debian.org/wheezy/wget

To reproduce:

A $> nc -lv 8020
B $> wget ftp://A:8020

On A keep entering "200 ok", the following will be printed:

> $ wget ftp://dexter:8020 > --2015-09-08 17:11:30-- ftp://dexter:8020/ > =>
‘.listing’ > Resolving dexter (dexter)... 10.160.4.160 > Connecting to
dexter (dexter)|10.160.4.160|:8020... connected. > Logging in as
anonymous ... Logged in! > ==> SYST ... done. ==> PWD ... done. > ==>
TYPE I ... done. ==> CWD not needed. > ==> PASV ... > Cannot parse PASV
response. > ==> PORT ...

On the server side:

> $ nc -lv 8020 > Connection from 10.160.4.160 port 8020 [tcp/intu-ec-svcdisc] accepted
> 200 ok > USER anonymous > 200 ok > SYST > 200 ok > PWD > 200 ok > TYPE
I > 200 ok > PASV > 200 ok > PORT 10,160,4,160,134,42
       ^^^^^^^^^^^^

This would affect IP users connecting through a privacy proxy or VPN,
leaking their public IP address if they are otherwise connected without
NAT. For users connecting without such a proxy but through NAT, it leaks
the internal IP address.

https://bugzilla.suse.com/show_bug.cgi?id=944858

Andreas

-- 
Andreas Stieger <astieger () suse com>
Project Manager Security
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)

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