Izdana je revizija sigurnosnog upozorenja oznake USN-1223-1, prvotno izdane 30. rujna, koja se odnosi na paket Puppet. Prvotna programska zakrpa je uzrokovala grešku pri korištenju SSH "authorized_keys" datoteka. Revizija je izdana kako bi se ispravila ova pogreška.
Paket:
puppet 0.x
Operacijski sustavi:
Ubuntu Linux 10.04
Kritičnost:
5.2
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-1223-2
Izvor:
Ubuntu
Problem:
Sigurnosni propusti su uzorkovani nesigurnim otvaranjem datoteka ukoliko je omogućen k5login, nepravilnim rukovanjem ovlastima pri stvaranju SSH authorized_keys datoteka te nepravilnim korištenjem --edit resursa.
Posljedica:
Propuste može iskoristiti lokalni napadač kako bi ostvario veće ovlasti, izmijenio proizvoljne datoteke ili pokrenuo programski kod.
Rješenje:
Korisnicima se savjetuje primjena novih programskih zakrpa.
==========================================================================
Ubuntu Security Notice USN-1223-2
October 05, 2011
puppet regression
==========================================================================
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)
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 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
Posljednje sigurnosne preporuke