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[USN-1223-1] Puppet vulnerabilities

Posted on 01 October 2011
Ubuntu Security

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Ubuntu Security Notice USN-1223-1
September 30, 2011

puppet vulnerabilities
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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

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

References:
http://www.ubuntu.com/usn/usn-1223-1
CVE-2011-3869, CVE-2011-3870, CVE-2011-3871

Package Information:
https://launchpad.net/ubuntu/+source/puppet/2.6.4-2ubuntu2.3
https://launchpad.net/ubuntu/+source/puppet/2.6.1-0ubuntu2.2
https://launchpad.net/ubuntu/+source/puppet/0.25.4-2ubuntu6.3

 

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