USN-1223-2: Puppet regression

Ubuntu Security Notice USN-1223-2

5th October, 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 version:

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

LP: 865462