USN-1223-1: Puppet vulnerabilities

Ubuntu Security Notice USN-1223-1

30th 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 version:

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

CVE-2011-3869, CVE-2011-3870, CVE-2011-3871