Ispravljen je sigurnosni propust vezan uz libpng kojeg je udaljeni napadač mogao iskoristiti za izvođenje DoS napada ili proizvoljno izvršavanje programskog koda s privilegijama korisnika.
Paket:
libpng10 1.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
Propust je posljedica nepravilnog rukovanja određenim memorijskim operacijama.
Posljedica:
Udaljeni napadač može iskoristiti navedeni propust za izvođenje DoS napada ili proizvoljno izvršavanje programskog koda s privilegijama korisnika koji je pokrenuo program ako uspije navesti korisnika da otvori posebno oblikovanu sliku.
Rješenje:
Korisnicima se savjetuje prelazak na ispravljenu inačicu.
==========================================================================
Ubuntu Security Notice USN-1417-1
April 05, 2012
libpng 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:
libpng could be made to crash or run programs as your login if it opened a
specially crafted file.
Software Description:
- libpng: PNG (Portable Network Graphics) file library
Details:
It was discovered that libpng incorrectly handled certain memory
operations. If a user or automated system using libpng were tricked into
opening a specially crafted image, an attacker could exploit this to cause
a denial of service or execute code with the privileges of the user
invoking the program.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
libpng12-0 1.2.46-3ubuntu1.3
Ubuntu 11.04:
libpng12-0 1.2.44-1ubuntu3.4
Ubuntu 10.10:
libpng12-0 1.2.44-1ubuntu0.4
Ubuntu 10.04 LTS:
libpng12-0 1.2.42-1ubuntu2.5
Ubuntu 8.04 LTS:
libpng12-0 1.2.15~beta5-3ubuntu0.7
After a standard system update you need to restart your session to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1417-1
CVE-2011-3048
Package Information:
https://launchpad.net/ubuntu/+source/libpng/1.2.46-3ubuntu1.3
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu3.4
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu0.4
https://launchpad.net/ubuntu/+source/libpng/1.2.42-1ubuntu2.5
https://launchpad.net/ubuntu/+source/libpng/1.2.15~beta5-3ubuntu0.7
Posljednje sigurnosne preporuke