U radu programskog paketa Quassel uočen je i ispravljen sigurnosni propust koji zlonamjernim korisnicima omogućuje pokretanje napada uskraćivanja usluge.
Paket:
quassel 0.x
Operacijski sustavi:
Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04
Problem:
neodgovarajuća provjera ulaznih podataka
Iskorištavanje:
udaljeno
Posljedica:
uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
Izvorni ID preporuke:
USN-1200-1
Izvor:
Ubuntu
Problem:
Uočen propust javlja se zbog neispravne obrade CTCP (eng. Client-To-Client-Protocol) zahtjeva.
Posljedica:
Udaljeni napadači mogu iskoristiti ovaj nedostatak za pokretanje DoS (eng. Denial of Service) napada.
Rješenje:
Svim se korisnicima savjetuje nadogradnja ranjivog paketa kako bi uočen propust ispravili.
==========================================================================
Ubuntu Security Notice USN-1200-1
September 10, 2011
quassel vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
A remote attacker could send crafted input to Quassel and cause it to
crash.
Software Description:
- quassel: KDE/Qt-based IRC client
Details:
It was discovered that Quassel did not properly handle CTCP requests. A
remote attacker could exploit this to cause a denial of service via
application crash.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
quassel-core 0.7.2-0ubuntu2.2
Ubuntu 10.10:
quassel-core 0.7.1-0ubuntu1.1
Ubuntu 10.04 LTS:
quassel-core 0.6.1-0ubuntu1.2
After a standard system update you need to restart Quassel to make all the
necessary changes.
References:
http://www.ubuntu.com/usn/usn-1200-1
https://launchpad.net/bugs/845707
Package Information:
https://launchpad.net/ubuntu/+source/quassel/0.7.2-0ubuntu2.2
https://launchpad.net/ubuntu/+source/quassel/0.7.1-0ubuntu1.1
https://launchpad.net/ubuntu/+source/quassel/0.6.1-0ubuntu1.2
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