[USN-1776-1] Linux kernel (EC2) vulnerabilities

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with undefined - http://www.enigmail.net/
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=v0LS
-----END PGP SIGNATURE-----
==========================================================================
Ubuntu Security Notice USN-1776-1
March 22, 2013

linux-ec2 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-ec2: Linux kernel for EC2

Details:

A flaw was reported in the permission checks done by the Linux kernel for
/dev/cpu/*/msr. A local root user with all capabilities dropped could
exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

A flaw was discovered in the Linux kernels handling of memory ranges with
PROT_NONE when transparent hugepages are in use. An unprivileged local user
could exploit this flaw to cause a denial of service (crash the system).
(CVE-2013-0309)

A flaw was discovered on the Linux kernel's VFAT filesystem driver when a
disk is mounted with the utf8 option (this is the default on Ubuntu). On a
system where disks/images can be auto-mounted or a FAT filesystem is
mounted an unprivileged user can exploit the flaw to gain root privileges.
(CVE-2013-1773)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 10.04 LTS:
linux-image-2.6.32-351-ec2 2.6.32-351.62

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-1776-1
CVE-2013-0268, CVE-2013-0309, CVE-2013-1773

Package Information:
https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-351.62