U radu jezgre operacijskog sustava Ubuntu (linux-fsl-imx51) uočene su tri sigurnosne ranjivosti koje lokalni napadač može iskoristiti za stjecanje povećanih ovlasti i izvođenje DoS napada.
Paket:
linux-fsl-imx51
Operacijski sustavi:
Ubuntu Linux 10.04
Kritičnost:
4.8
Problem:
pogreška u programskoj komponenti
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, uskraćivanje usluga (DoS)
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-4077, CVE-2011-4132, CVE-2011-4330
Izvorni ID preporuke:
USN-1300-1
Izvor:
Ubuntu
Problem:
Ranjivosti su posljedica neodgovarajućeg rukovanja putanjama u XFS datotečnom sustavu, pogreške u komponenti Journaling Block Device te nepravilnosti u provjeri granica u HFS datotečnom sustavu.
Posljedica:
Napadač ih može iskoristiti za izvođenje DoS napada i dobivanje administratorskih ovlasti.
Rješenje:
Korisnicima se savjetuje korištenje ispravljene inačice.
==========================================================================
Ubuntu Security Notice USN-1300-1
December 13, 2011
linux-fsl-imx51 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-fsl-imx51: Linux kernel for IMX51
Details:
A bug was discovered in the XFS filesystem's handling of pathnames. A local
attacker could exploit this to crash the system, leading to a denial of
service, or gain root privileges. (CVE-2011-4077)
A flaw was found in the Journaling Block Device (JBD). A local attacker
able to mount ext3 or ext4 file systems could exploit this to crash the
system, leading to a denial of service. (CVE-2011-4132)
Clement Lecigne discovered a bug in the HFS file system bounds checking.
When a malformed HFS file system is mounted a local user could crash the
system or gain root privileges. (CVE-2011-4330)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.31-612-imx51 2.6.31-612.31
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.
References:
http://www.ubuntu.com/usn/usn-1300-1
CVE-2011-4077, CVE-2011-4132, CVE-2011-4330
Package Information:
https://launchpad.net/ubuntu/+source/linux-fsl-imx51/2.6.31-612.31
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