Otkrivena su dva nedostatka u jezgri operacijskog sustava Ubuntu 12.04 LTS koje lokalni napadači mogu iskoristiti za DoS (eng. Denial of Service) napad i čitanje osjetljivih informacija.
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Ubuntu Security Notice USN-1579-1
September 21, 2012
linux vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
linux-image-3.2.0-31-generic 3.2.0-31.50
linux-image-3.2.0-31-generic-pae 3.2.0-31.50
linux-image-3.2.0-31-highbank 3.2.0-31.50
linux-image-3.2.0-31-omap 3.2.0-31.50
linux-image-3.2.0-31-powerpc-smp 3.2.0-31.50
linux-image-3.2.0-31-powerpc64-smp 3.2.0-31.50
linux-image-3.2.0-31-virtual 3.2.0-31.50
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-1579-1
CVE-2012-3412, CVE-2012-3430
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-31.50
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