Objavljena je revizija sigurnosne preporuke oznake USN-1238-1. U izvornoj je preporuci opisan nedostatak paketa Puppet koji napadaču omogućuje izvođenje MITM (eng. man-in-the-middle) napada.

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Ubuntu Security Notice USN-1238-2
October 25, 2011

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

- Ubuntu 11.04

Summary:

USN-1238-1 caused a regression on Ubuntu 11.04.

Software Description:
- puppet: Centralized configuration management

Details:

USN-1238-1 fixed vulnerabilities in Puppet. The upstream patch introduced a
regression in Ubuntu 11.04 when executing certain commands. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that Puppet incorrectly handled the non-default
 "certdnsnames" option when generating certificates. If this setting was
 added to puppet.conf, the puppet masterâ??s DNS alt names were added to the
 X.509 Subject Alternative Name field of all certificates, not just the
 puppet masterâ??s certificate. An attacker that has an incorrect agent
 certificate in his possession can use it to impersonate the puppet master
 in a man-in-the-middle attack.

Update instructions:

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

Ubuntu 11.04:
  puppet-common                   2.6.4-2ubuntu2.6

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1238-2
  http://www.ubuntu.com/usn/usn-1238-1
  https://launchpad.net/bugs/881361

Package Information:
  https://launchpad.net/ubuntu/+source/puppet/2.6.4-2ubuntu2.6