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USN-1223-2: Puppet regression

5 October 2011

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

Releases

Packages

  • 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

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