U radu programskog paketa libxml2 uočen je i ispravljen sigurnosni nedostatak kojeg udaljeni napadač može iskoristiti za izvođenje DoS (eng. Denial of Service) napada.
Paket:
libxml 2.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
Kritičnost:
6.8
Problem:
pogreška u programskoj komponenti
Iskorištavanje:
udaljeno
Posljedica:
uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2012-0841
Izvorni ID preporuke:
USN-1376-1
Izvor:
Ubuntu
Problem:
Propust je posljedica kolizija u hash tablici koje produžuju vrijeme obrade, a moguće ih je izazvati posebno oblikovanom XML datotekom.
Posljedica:
Zlonamjerni korisnik može iskoristiti navedeni propust za izvođenje napada uskraćivanjem usluge (DoS).
==========================================================================
Ubuntu Security Notice USN-1376-1
February 27, 2012
libxml2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
libxml2 could be made to cause a denial of service by consuming excessive
CPU resources.
Software Description:
- libxml2: GNOME XML library
Details:
Juraj Somorovsky discovered that libxml2 was vulnerable to hash table
collisions. If a user or application linked against libxml2 were tricked
into opening a specially crafted XML file, an attacker could cause a
denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.2
Ubuntu 11.04:
libxml2 2.7.8.dfsg-2ubuntu0.3
Ubuntu 10.10:
libxml2 2.7.7.dfsg-4ubuntu0.4
Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.4
Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.8
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1376-1
CVE-2012-0841
Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-4ubuntu0.2
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-2ubuntu0.3
https://launchpad.net/ubuntu/+source/libxml2/2.7.7.dfsg-4ubuntu0.4
https://launchpad.net/ubuntu/+source/libxml2/2.7.6.dfsg-1ubuntu1.4
https://launchpad.net/ubuntu/+source/libxml2/2.6.31.dfsg-2ubuntu1.8
Posljednje sigurnosne preporuke