USN-1223-2: Puppet regression

5 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 versions:

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