USN-2615-1: Linux kernel (Utopic HWE) vulnerabilities

Releases

• Ubuntu 14.04 ESM

Packages

• linux-lts-utopic - Linux hardware enablement kernel from Utopic

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 memory corruption issue was discovered in AES decryption when using the
Intel AES-NI accelerated code path. A remote attacker could exploit this
flaw to cause a denial of service (system crash) or potentially escalate
privileges on Intel base machines with AEC-GCM mode IPSec security
association. (CVE-2015-3331)

A flaw was discovered in the Linux kernel's IPv4 networking when using TCP
fast open to initiate a connection. An unprivileged local user could
exploit this flaw to cause a denial of service (system crash).
(CVE-2015-3332)

Update instructions

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

Ubuntu 14.04

• linux-image-3.16.0-38-generic - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-generic-lpae - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-lowlatency - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-powerpc-e500mc - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-powerpc-smp - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-powerpc64-emb - 3.16.0-38.52~14.04.1
• linux-image-3.16.0-38-powerpc64-smp - 3.16.0-38.52~14.04.1

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-2015-3331
• CVE-2015-3332

Related notices

• USN-2616-1: linux-image-3.16.0-38-powerpc-smp, linux-image-3.16.0-38-powerpc-e500mc, linux-image-3.16.0-38-powerpc64-emb, linux, linux-image-3.16.0-38-generic-lpae, linux-image-3.16.0-38-powerpc64-smp, linux-image-3.16.0-38-generic, linux-image-3.16.0-38-lowlatency
• USN-2663-1: linux-image-3.13.0-57-generic, linux-image-3.13.0-57-powerpc64-smp, linux, linux-image-extra-3.13.0-57-generic, linux-image-3.13.0-57-powerpc64-emb, linux-image-3.13.0-57-lowlatency, linux-image-3.13.0-57-powerpc-e500, linux-image-3.13.0-57-generic-lpae, linux-image-3.13.0-57-powerpc-e500mc, linux-image-3.13.0-57-powerpc-smp
• USN-2662-1: linux-image-3.13.0-57-generic-lpae, linux-image-3.13.0-57-generic, linux-lts-trusty
• USN-2613-1: linux-lts-trusty, linux-image-3.13.0-53-generic-lpae, linux-image-3.13.0-53-generic
• USN-2631-1: linux-image-3.2.0-85-powerpc64-smp, linux-image-3.2.0-85-omap, linux-image-3.2.0-85-generic-pae, linux-image-3.2.0-85-virtual, linux, linux-image-3.2.0-85-generic, linux-image-3.2.0-85-powerpc-smp, linux-image-3.2.0-85-highbank
• USN-2632-1: linux-image-3.2.0-1465-omap4, linux-ti-omap4
• USN-2614-1: linux-image-3.13.0-53-generic-lpae, linux-image-3.13.0-53-powerpc-e500mc, linux, linux-image-3.13.0-53-powerpc-e500, linux-image-3.13.0-53-powerpc64-smp, linux-image-3.13.0-53-generic, linux-image-3.13.0-53-powerpc-smp, linux-image-3.13.0-53-powerpc64-emb, linux-image-3.13.0-53-lowlatency, linux-image-extra-3.13.0-53-generic
• USN-2620-1: linux-image-3.13.0-53-generic-lpae, linux-image-3.13.0-53-powerpc-e500mc, linux, linux-image-3.13.0-53-powerpc-e500, linux-image-3.13.0-53-powerpc64-smp, linux-image-3.13.0-53-generic, linux-image-3.13.0-53-powerpc-smp, linux-image-3.13.0-53-powerpc64-emb, linux-image-3.13.0-53-lowlatency, linux-image-extra-3.13.0-53-generic
• USN-2619-1: linux-lts-trusty, linux-image-3.13.0-53-generic-lpae, linux-image-3.13.0-53-generic