U radu programske biblioteke libpng uočen je sigurnosni nedostatak kojeg zlonamjerni napadači mogu iskoristiti za napad uskraćivanjem usluga ili proizvoljno pokretanje programskog koda.
Paket:
libpng 1.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
Kritičnost:
5.9
Problem:
neodgovarajuće rukovanje datotekama
Iskorištavanje:
udaljeno
Posljedica:
dobivanje većih privilegija, proizvoljno izvršavanje programskog koda, uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-3045
Izvorni ID preporuke:
USN-1402-1
Izvor:
Ubuntu
Problem:
Uočeno je da programska biblioteka ne obrađuje blokove komprimiranih podataka na odgovarajući način.
Posljedica:
Napadač može, koristeći zloćudno oblikovane datoteke, izvršiti napad uskraćivanjem usluga (eng. Denial of Service) ili proizvoljno pokrenuti programski kod s privilegijama korisnika koji je pokrenuo ranjivi program.
Rješenje:
Svim korisnicima se savjetuje korištenje službenih programskih zakrpi.
==========================================================================
Ubuntu Security Notice USN-1402-1
March 22, 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 did not properly process compressed chunks.
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 1.2.46-3ubuntu1.2
Ubuntu 11.04:
libpng12-0 1.2.44-1ubuntu3.3
Ubuntu 10.10:
libpng12-0 1.2.44-1ubuntu0.3
Ubuntu 10.04 LTS:
libpng12-0 1.2.42-1ubuntu2.4
Ubuntu 8.04 LTS:
libpng12-0 1.2.15~beta5-3ubuntu0.6
After a standard system update you need to restart your session to make all
the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1402-1
CVE-2011-3045
Package Information:
https://launchpad.net/ubuntu/+source/libpng/1.2.46-3ubuntu1.2
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu3.3
https://launchpad.net/ubuntu/+source/libpng/1.2.44-1ubuntu0.3
https://launchpad.net/ubuntu/+source/libpng/1.2.42-1ubuntu2.4
https://launchpad.net/ubuntu/+source/libpng/1.2.15~beta5-3ubuntu0.6
Posljednje sigurnosne preporuke