Uočen je novi sigurnosni nedostatak u radu programskog paketa libxml2 kojeg udaljeni napadač može iskoristiti za DoS (eng. Denial of Service) napad i izvršavanje proizvoljnog programskog koda.
Paket:
libxml 2.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 11.04, Ubuntu Linux 11.10, Ubuntu Linux 12.04
Kritičnost:
10
Problem:
pogreška u programskoj komponenti, preljev međuspremnika
Iskorištavanje:
udaljeno
Posljedica:
uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-3102
Izvorni ID preporuke:
USN-1447-1
Izvor:
Ubuntu
Problem:
Sigurnosni propust je posljedica preljeva međuspremnika, odnosno OBOE (eng. Off-By-One Error) pogreške u XPointer funkcionalnosti.
Posljedica:
Udaljeni napadač spomenutu ranjivost može iskoristiti za napada uskraćivanjem usluga (DoS) i pokretanje proizvoljnog programskog koda podmetanjem posebno oblikovane XML datoteke.
Rješenje:
Svim se korisnicima savjetuje korištenje dostupnih zakrpa.
==========================================================================
Ubuntu Security Notice USN-1447-1
May 21, 2012
libxml2 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:
Applications using libxml2 could be made to crash or run programs as your
login if they opened a specially crafted file.
Software Description:
- libxml2: GNOME XML library
Details:
Juri Aedla discovered that libxml2 contained an off by one error in its
XPointer functionality. If a user or application linked against libxml2
were tricked into opening a specially crafted XML file, an attacker could
cause the application to crash or possibly execute arbitrary 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 12.04 LTS:
libxml2 2.7.8.dfsg-5.1ubuntu4.1
Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.3
Ubuntu 11.04:
libxml2 2.7.8.dfsg-2ubuntu0.4
Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.5
Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.9
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1447-1
CVE-2011-3102
Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.1
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-4ubuntu0.3
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-2ubuntu0.4
https://launchpad.net/ubuntu/+source/libxml2/2.7.6.dfsg-1ubuntu1.5
https://launchpad.net/ubuntu/+source/libxml2/2.6.31.dfsg-2ubuntu1.9
Posljednje sigurnosne preporuke