U radu jezgre operacijskog sustava Ubuntu 10.04 LTS otkrivena su tri propusta koji omogućavaju izvršavanje napada uskraćivanjem usluge (eng. Denial of Service) te otkrivanje osjetljivih informacija.
Paket:
Linux kernel 2.6.x
Operacijski sustavi:
Ubuntu Linux 10.04
Kritičnost:
1.7
Problem:
neodgovarajuće rukovanje memorijom, pogreška u programskoj komponenti
Nepravilnosti su uzrokovane nedostacima unutar upravljačkih programa za mrežu koji omogućavaju TSO funkcionalnosti, unutar implementacije RDS priključnica te zbog neodgovarajućeg rukovanja memorijom.
Posljedica:
Zlonamjerni korisnik bi mogao iskoristiti propuste za izvođenje DoS napada te pregled povjerljivih podataka.
Rješenje:
Svim se korisnicima savjetuje instalacija nadogradnji.
==========================================================================
Ubuntu Security Notice USN-1572-1
September 19, 2012
linux 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: Linux kernel
Details:
Ben Hutchings reported a flaw in the Linux kernel with some network drivers
that support TSO (TCP segment offload). A local or peer user could exploit
this flaw to to cause a denial of service. (CVE-2012-3412)
Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
implementation of RDS sockets. A local unprivileged user could potentially
use this flaw to read privileged information from the kernel.
(CVE-2012-3430)
A flaw was discovered in the madvise feature of the Linux kernel's memory
subsystem. An unprivileged local use could exploit the flaw to cause a
denial of service (crash the system). (CVE-2012-3511)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.32-43-386 2.6.32-43.97
linux-image-2.6.32-43-generic 2.6.32-43.97
linux-image-2.6.32-43-generic-pae 2.6.32-43.97
linux-image-2.6.32-43-ia64 2.6.32-43.97
linux-image-2.6.32-43-lpia 2.6.32-43.97
linux-image-2.6.32-43-powerpc 2.6.32-43.97
linux-image-2.6.32-43-powerpc-smp 2.6.32-43.97
linux-image-2.6.32-43-powerpc64-smp 2.6.32-43.97
linux-image-2.6.32-43-preempt 2.6.32-43.97
linux-image-2.6.32-43-server 2.6.32-43.97
linux-image-2.6.32-43-sparc64 2.6.32-43.97
linux-image-2.6.32-43-sparc64-smp 2.6.32-43.97
linux-image-2.6.32-43-versatile 2.6.32-43.97
linux-image-2.6.32-43-virtual 2.6.32-43.97
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-1572-1
CVE-2012-3412, CVE-2012-3430, CVE-2012-3511
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.32-43.97
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