USN-1223-1: Puppet vulnerabilities

30 September 2011

puppet vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS

Summary

Puppet could be made to overwrite files and run programs with administrator privileges.

Software Description

  • puppet - Centralized configuration management

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 11.04
puppet-common - 2.6.4-2ubuntu2.3
Ubuntu 10.10
puppet-common - 2.6.1-0ubuntu2.2
Ubuntu 10.04 LTS
puppet-common - 0.25.4-2ubuntu6.3

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