USN-835-1: neon vulnerabilities

21 September 2009

neon, neon27 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • neon27
  • neon


Joe Orton discovered that neon did not correctly handle SSL certificates with zero bytes in the Common Name. A remote attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.04
libneon27 - 0.28.2-6.1ubuntu0.1
libneon27-gnutls - 0.28.2-6.1ubuntu0.1
Ubuntu 8.10
libneon27 - 0.28.2-2ubuntu0.1
libneon27-gnutls - 0.28.2-2ubuntu0.1
Ubuntu 8.04 LTS
libneon27 - 0.27.2-1ubuntu0.1
libneon27-gnutls - 0.27.2-1ubuntu0.1
Ubuntu 6.06 LTS
libneon25 - 0.25.5.dfsg-5ubuntu0.1

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.