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[USN-1223-2] Puppet regression

Posted on 06 October 2011
Ubuntu Security

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Ubuntu Security Notice USN-1223-2
October 05, 2011

puppet regression
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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=
)
=20
Ricky Zhou discovered that Puppet did not drop privileges when creating
SSH authorized_keys files. A local attacker could exploit this to overwrit=
e
arbitrary files as root. (CVE-2011-3870)
=20
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

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

References:
http://www.ubuntu.com/usn/usn-1223-2
http://www.ubuntu.com/usn/usn-1223-1
https://launchpad.net/bugs/865462

Package Information:
https://launchpad.net/ubuntu/+source/puppet/0.25.4-2ubuntu6.4

 

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