Two Years of Broken Crypto: Debian's Dress Rehearsal for a Global PKI Compromise

  • Authors:
  • David Ahmad

  • Affiliations:
  • Bombardier Aerospace

  • Venue:
  • IEEE Security and Privacy
  • Year:
  • 2008

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Abstract

A patch to the OpenSSL package maintained by Debian GNU/Linux (an operating system composed of free and open source software that can be used as a desktop or server OS) submitted in 2006 weakened its pseudo-random number generator (PRNG), a critical component for secure key generation. Unnoticed for two years, the weak PRNG created a crypto-implementation nightmare with wide-ranging consequences that are difficult to repair. Putting both servers and users at risk, this vulnerability affected OpenSSH, Apache (mod_ssl), the onion router (TOR), OpenVPN, and other applications. In this article, I'll examine the issue and its consequences.