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As an ettercap expert, it was easy to launch an ARP-Poisoning attack against our flag-decryption service, will you be able to pwn it?

The mail you intercepted earlier might be of some help.

nc lse.epita.fr 52112
nc lse.epita.fr 52113

From: Security Expert <consultant@bs-corp.com>
To: Jason Duconcombre <jason.duconcombre@lse.epita.fr>
Subject: Secure flag-decryption service
X-Mailer: Microsoft Outlook 14.0

Hello <b>Mr Duconcombre</b>,

Here are the parameters for the Diffie-Hellman key-exchange scheme we are
using to secure our flag-decryption service.

Diffie-Hellman parameters:
  Prime number (1024 bits):
    1139649291960668213363669792988618183131797245466265411090728384138740
    2017329978043397379534019650166046216351495466139292486384527471875370
    4787205539549276810197120014850491162715330966887136497089294780304076
    1266906525645139073329003621812324838746578520510299645676312148901190
    40545429675302494330946521713

  Base (generator):
    3424860958663767697310780392258241243770258084442022147316219507895069
    6209173104609029950789695543602298288897827193630545923101990232379210
    2100586857642567072365725763276113213437384415034693791636136900150156
    7417905568152798861899726826664532183647441675163943844258479788161805
    08382685723373978363239269455

The channel is encrypted with AES-128 in ECB mode, the key is derived from
the first 16 digits of the decimal number obtained via DH.

As a friendly reminder, you owe me $8,682.82.

Regards,

Name Solved on
null 2012-12-12 15:29
discochewbacca 2012-12-12 17:29
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