USN-2663-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2663-1

7th July, 2015

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

• linux - Linux kernel

Details

Alexandre Oliva reported a race condition flaw in the btrfs file system's
handling of extended attributes (xattrs). A local attacker could exploit
this flaw to bypass ACLs and potentially escalate privileges.
(CVE-2014-9710)

A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)

A division by zero error was discovered in the Linux kernel's Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)

Carl H Lunde discovered missing sanity checks in the the Linux kernel's UDF
file system (CONFIG_UDF_FS). A local attacker could exploit this flaw to
cause a denial of service (system crash) by using a corrupted file system
image. (CVE-2015-4167)

Update instructions

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

Ubuntu 14.04 LTS:

linux-image-3.13.0-57-powerpc-smp 3.13.0-57.95

linux-image-3.13.0-57-powerpc-e500 3.13.0-57.95

linux-image-3.13.0-57-lowlatency 3.13.0-57.95

linux-image-3.13.0-57-powerpc-e500mc 3.13.0-57.95

linux-image-3.13.0-57-generic-lpae 3.13.0-57.95

linux-image-3.13.0-57-powerpc64-emb 3.13.0-57.95

linux-image-3.13.0-57-powerpc64-smp 3.13.0-57.95

linux-image-3.13.0-57-generic 3.13.0-57.95

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

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

CVE-2014-9710, CVE-2015-1420, CVE-2015-4001, CVE-2015-4002, CVE-2015-4003, CVE-2015-4167

from Ubuntu Security Notices http://ift.tt/1Ha4qGK