USN-1833-1: Linux kernel vulnerabilities
24 May 2013
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
Andy Lutomirski discover an error in the Linux kernel's credential handling
on unix sockets. A local user could exploit this flaw to gain
administrative privileges. (CVE-2013-1979)
A buffer overflow vulnerability was discovered in the Broadcom tg3 ethernet
driver for the Linux kernel. A local user could exploit this flaw to cause
a denial of service (crash the system) or potentially escalate privileges
on the system. (CVE-2013-1929)
An information leak was discovered in the Linux kernel's tkill and tgkill
system calls when used from compat processes. A local user could exploit
this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)
A flaw was discovered in the Linux kernel's ftrace subsystem interface. A
local user could exploit this flaw to cause a denial of service (system
crash). (CVE-2013-3301)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.04
-
linux-image-3.2.0-44-highbank
-
3.2.0-44.69
-
linux-image-3.2.0-44-omap
-
3.2.0-44.69
-
linux-image-3.2.0-44-generic-pae
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3.2.0-44.69
-
linux-image-3.2.0-44-powerpc64-smp
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3.2.0-44.69
-
linux-image-3.2.0-44-virtual
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3.2.0-44.69
-
linux-image-3.2.0-44-generic
-
3.2.0-44.69
-
linux-image-3.2.0-44-powerpc-smp
-
3.2.0-44.69
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.