U radu jezgre operacijskog sustava Ubuntu (linux-fsl-imx51) uočene su tri sigurnosne ranjivosti koje lokalni napadač može iskoristiti za otkrivanje osjetljivih informacija ili izvođenje DoS napada.
Propusti su posljedica nepravilnosti pri čitanju TMP podataka, pogreške u HFS datotečnom sustavu te nepravilnog rukovanja korisnički definiranim ključevima.
Posljedica:
Lokalni napadač može iskoristiti navedene propuste za pristup rezultatima prethodno izvedene TMP naredbe ili za izvođenje DoS (eng. Denial of Service) napada.
==========================================================================
Ubuntu Security Notice USN-1318-1
January 05, 2012
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:
Peter Huewe discovered an information leak in the handling of reading
security-related TPM data. A local, unprivileged user could read the
results of a previous TPM command. (CVE-2011-1162)
Clement Lecigne discovered a bug in the HFS filesystem. A local attacker
could exploit this to cause a kernel oops. (CVE-2011-2203)
A flaw was found in how the Linux kernel handles user-defined key types. An
unprivileged local user could exploit this to crash the system.
(CVE-2011-4110)
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 2.6.31-612.32
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-1318-1
CVE-2011-1162, CVE-2011-2203, CVE-2011-4110
Package Information:
https://launchpad.net/ubuntu/+source/linux-fsl-imx51/2.6.31-612.32
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