U radu programskog paketa dbus uočena je i ispravljena ranjivost koju su zloćudni korisnici mogli iskoristiti za dobivanje većih privilegija i proizvoljno izvršavanje programskog koda.
Paket:
dbus 1.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 11.04, Ubuntu Linux 11.10, Ubuntu Linux 12.04
Kritičnost:
6
Problem:
neodgovarajuće rukovanje datotekama
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, proizvoljno izvršavanje programskog koda
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2012-3524
Izvorni ID preporuke:
USN-1576-1
Izvor:
Ubuntu
Problem:
Uočeno je da programski paket nepravilno rukuje varijablama okruženja (eng. environment variables).
Posljedica:
Lokalni napadač može iskoristiti nedostatak te pomoću programske komponente "setuid" zadobiti privilegije administatora te pokrenuti proizvoljni programski kod.
Rješenje:
Rješenje problema sigurnosti je nadogradnja ranjivog paketa.
==========================================================================
Ubuntu Security Notice USN-1576-1
September 20, 2012
dbus vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
DBus could be made to run programs as an administrator.
Software Description:
- dbus: simple interprocess messaging system
Details:
Sebastian Krahmer discovered that DBus incorrectly handled environment
variables when running with elevated privileges. A local attacker could
possibly exploit this flaw with a setuid binary and gain root privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
dbus 1.4.18-1ubuntu1.1
libdbus-1-3 1.4.18-1ubuntu1.1
Ubuntu 11.10:
dbus 1.4.14-1ubuntu1.1
libdbus-1-3 1.4.14-1ubuntu1.1
Ubuntu 11.04:
dbus 1.4.6-1ubuntu6.2
libdbus-1-3 1.4.6-1ubuntu6.2
Ubuntu 10.04 LTS:
dbus 1.2.16-2ubuntu4.5
libdbus-1-3 1.2.16-2ubuntu4.5
Ubuntu 8.04 LTS:
dbus 1.1.20-1ubuntu3.7
libdbus-1-3 1.1.20-1ubuntu3.7
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1576-1
CVE-2012-3524
Package Information:
https://launchpad.net/ubuntu/+source/dbus/1.4.18-1ubuntu1.1
https://launchpad.net/ubuntu/+source/dbus/1.4.14-1ubuntu1.1
https://launchpad.net/ubuntu/+source/dbus/1.4.6-1ubuntu6.2
https://launchpad.net/ubuntu/+source/dbus/1.2.16-2ubuntu4.5
https://launchpad.net/ubuntu/+source/dbus/1.1.20-1ubuntu3.7
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