U radu programskog paketa puppet uočena su tri sigurnosna propusta. Lokalni napadač propuste može iskoristiti za dobivanje većih privilegija u sustavu, izmjenu podataka te proizvoljno pokretanje programskog koda.
Paket:
puppet 0.x
Operacijski sustavi:
Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04
Kritičnost:
6
Problem:
nepravilno rukovanje ovlastima, pogreška u programskoj komponenti
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, izmjena podataka, proizvoljno izvršavanje programskog koda
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-3869, CVE-2011-3870, CVE-2011-3871
Izvorni ID preporuke:
USN-1223-1
Izvor:
Ubuntu
Problem:
Sigurnosne ranjivosti su posljedica nesigurnog otvaranja datoteka kada se koristi "k5login", nepravilnog rukovanja ovlastima u "SSH authorized_keys" datotekama te pogreške prilikom korištenja "--edit" resursa.
Posljedica:
Lokalni napadač navedene ranjivosti može iskoristiti za izmjenu podataka, dobivanje većih ovlasti te pokretanje proizvoljnog programskog koda.
Rješenje:
Svim se korisnicima navedenog programskog paketa, u svrhu zaštite sigurnosti, savjetuje nadogradnja na novije inačice.
==========================================================================
Ubuntu Security Notice USN-1223-1
September 30, 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
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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