[USN-1223-2] Puppet regression

Jamie Strandboge jamie at canonical.com
Wed Oct 5 22:12:55 UTC 2011


==========================================================================
Ubuntu Security Notice USN-1223-2
October 05, 2011

puppet regression
==========================================================================

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

- Ubuntu 10.04 LTS

Summary:

USN-1223-1 caused a regression with managing SSH authorized_keys files.

Software Description:
- puppet: Centralized configuration management

Details:

USN-1223-1 fixed vulnerabilities in Puppet. A regression was found on
Ubuntu 10.04 LTS that caused permission denied errors when managing SSH
authorized_keys files with Puppet. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that Puppet unsafely opened files when the k5login type
 is used to manage files. A local attacker could exploit this to overwrite
 arbitrary files which could be used to escalate privileges. (CVE-2011-3869)
 
 Ricky Zhou discovered that Puppet did not drop privileges when creating
 SSH authorized_keys files. A local attacker could exploit this to overwrite
 arbitrary files as root. (CVE-2011-3870)
 
 It was discovered that Puppet used a predictable filename when using the
 --edit resource. A local attacker could exploit this to edit arbitrary
 files or run arbitrary code as the user invoking the program, typically
 root. (CVE-2011-3871)

Update instructions:

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

Ubuntu 10.04 LTS:
  puppet-common                   0.25.4-2ubuntu6.4

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

References:
  http://www.ubuntu.com/usn/usn-1223-2
  http://www.ubuntu.com/usn/usn-1223-1
  https://launchpad.net/bugs/865462

Package Information:
  https://launchpad.net/ubuntu/+source/puppet/0.25.4-2ubuntu6.4


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