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Hacked D.C. online voting system stored login and encryption key on server

Posted on October 7, 2010 by Dissent

Kim Zetter writes:

An internet-based voting system that was hacked last week by researchers at the University of Michigan stored its database username, password and encryption key on a server open to attack.

Alex Halderman, a computer scientist at the university, has detailed the vulnerabilities and hacking techniques his students used to completely control the system last week. The hack allowed them to change votes and program the system to play his school’s fight song “Hail to the Victors” after each voter cast their ballot.

Read more on Threat Level.

J. Alex Halderman describes their demonstration (emphasis added by me):

  • We collected crucial secret data stored on the server, including the database username and password as well as the public key used to encrypt the ballots.
  • We modified all the ballots that had already been cast to contain write-in votes for candidates we selected. (Although the system encrypts voted ballots, we simply discarded the encrypted files and replaced them with different ones that we encrypted using the same key.) We also rigged the system to replace future votes in the same way.
  • We installed a back door that let us view any ballots that voters cast after our attack. This modification recorded the votes, in unencrypted form, together with the names of the voters who cast them, violating ballot secrecy.
  • To show that we had control of the server, we left a “calling card” on the system’s confirmation screen, which voters see after voting. After 15 seconds, the page plays the University of Michigan fight song. Here’s a demonstration.

I don’t even know how to categorize this breach other than as a useful example of why it’s a good idea to run these kinds of tests and invite the public and security professionals to try to be evil.

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