U radu jezgre operacijskog sustava Ubuntu 11.10 uočena su dva sigurnosna propusta. Lokalnim napadačima omogućuju izvođenje DoS napada i otkrivanje osjetljivih informacija.
Propusti su posljedica nepravilnosti u pojedinim mrežnim upravljačkim programima koji podržavaju TSO te pogreške u implementaciji RDS priključnica (eng socket).
Posljedica:
Napadači ih mogu iskoristiti za izvođenje napada uskraćivanjem usluge i pregled osjetljivih podataka.
Rješenje:
Korisnicima se preporuča korištenje novih programskih rješenja.
==========================================================================
Ubuntu Security Notice USN-1568-1
September 14, 2012
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
linux-image-3.0.0-26-generic 3.0.0-26.42
linux-image-3.0.0-26-generic-pae 3.0.0-26.42
linux-image-3.0.0-26-omap 3.0.0-26.42
linux-image-3.0.0-26-powerpc 3.0.0-26.42
linux-image-3.0.0-26-powerpc-smp 3.0.0-26.42
linux-image-3.0.0-26-powerpc64-smp 3.0.0-26.42
linux-image-3.0.0-26-server 3.0.0-26.42
linux-image-3.0.0-26-virtual 3.0.0-26.42
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-1568-1
CVE-2012-3412, CVE-2012-3430
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.0.0-26.42
Posljednje sigurnosne preporuke