USN-2447-1: Linux kernel (Utopic HWE) vulnerabilities

Releases

• Ubuntu 14.04 ESM

Packages

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

Details

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register in the x86
architecture. A local attacker could exploit this flaw to gain
administrative privileges. (CVE-2014-9322)

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2014-3673)

A flaw in the handling of duplicate ASCONF chunks by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel was discovered. A
remote attacker could exploit this flaw to cause a denial of service
(panic). (CVE-2014-3687)

It was discovered that excessive queuing by SCTP (Stream Control
Transmission Protocol) implementation in the Linux kernel can cause memory
pressure. A remote attacker could exploit this flaw to cause a denial of
service. (CVE-2014-3688)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

Andy Lutomirski discovered a flaw in how the Linux kernel handles
pivot_root when used with a chroot directory. A local user could exploit
this flaw to cause a denial of service (mount-tree loop). (CVE-2014-7970)

Dmitry Monakhov discovered a race condition in the ext4_file_write_iter
function of the Linux kernel's ext4 filesystem. A local user could exploit
this flaw to cause a denial of service (file unavailability).
(CVE-2014-8086)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

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

Ubuntu 14.04

• linux-image-3.16.0-28-generic - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-generic-lpae - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-lowlatency - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-powerpc-e500mc - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-powerpc-smp - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-powerpc64-emb - 3.16.0-28.37~14.04.1
• linux-image-3.16.0-28-powerpc64-smp - 3.16.0-28.37~14.04.1

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-2014-3673
• CVE-2014-3687
• CVE-2014-3688
• CVE-2014-7825
• CVE-2014-7826
• CVE-2014-7970
• CVE-2014-8086
• CVE-2014-8134
• CVE-2014-8369
• CVE-2014-9090
• CVE-2014-9322

Related notices

• USN-2442-1: linux-ec2, linux-image-2.6.32-374-ec2
• USN-2445-1: linux-lts-trusty, linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-generic
• USN-2417-1: linux-image-3.2.0-72-generic-pae, linux, linux-image-3.2.0-72-virtual, linux-image-3.2.0-72-generic, linux-image-3.2.0-72-omap, linux-image-3.2.0-72-highbank, linux-image-3.2.0-72-powerpc-smp, linux-image-3.2.0-72-powerpc64-smp
• USN-2448-1: linux-image-3.16.0-28-powerpc64-emb, linux, linux-image-3.16.0-28-powerpc-smp, linux-image-3.16.0-28-generic, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-smp
• USN-2446-1: linux-image-3.13.0-43-powerpc-e500, linux, linux-image-3.13.0-43-powerpc-e500mc, linux-image-3.13.0-43-powerpc-smp, linux-image-3.13.0-43-powerpc64-emb, linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-powerpc64-smp, linux-image-extra-3.13.0-43-generic, linux-image-3.13.0-43-lowlatency, linux-image-3.13.0-43-generic
• USN-2441-1: linux-image-2.6.32-70-generic, linux, linux-image-2.6.32-70-preempt, linux-image-2.6.32-70-versatile, linux-image-2.6.32-70-ia64, linux-image-2.6.32-70-powerpc64-smp, linux-image-2.6.32-70-generic-pae, linux-image-2.6.32-70-lpia, linux-image-2.6.32-70-sparc64-smp, linux-image-2.6.32-70-386, linux-image-2.6.32-70-sparc64, linux-image-2.6.32-70-powerpc, linux-image-2.6.32-70-server, linux-image-2.6.32-70-virtual, linux-image-2.6.32-70-powerpc-smp
• USN-2418-1: linux-ti-omap4, linux-image-3.2.0-1456-omap4
• USN-2443-1: linux, linux-image-3.2.0-74-generic-pae, linux-image-3.2.0-74-omap, linux-image-3.2.0-74-powerpc-smp, linux-image-3.2.0-74-powerpc64-smp, linux-image-3.2.0-74-generic, linux-image-3.2.0-74-highbank, linux-image-3.2.0-74-virtual
• USN-2444-1: linux-image-3.2.0-1457-omap4, linux-ti-omap4
• USN-2419-1: linux-lts-trusty, linux-image-3.13.0-40-generic-lpae, linux-image-3.13.0-40-generic
• USN-2514-1: linux-ti-omap4, linux-image-3.2.0-1460-omap4
• USN-2513-1: linux-image-3.2.0-77-generic, linux-image-3.2.0-77-omap, linux, linux-image-3.2.0-77-powerpc64-smp, linux-image-3.2.0-77-generic-pae, linux-image-3.2.0-77-virtual, linux-image-3.2.0-77-powerpc-smp, linux-image-3.2.0-77-highbank
• USN-2420-1: linux-image-3.13.0-40-powerpc-smp, linux-image-3.13.0-40-powerpc64-emb, linux-image-3.13.0-40-powerpc-e500, linux, linux-image-3.13.0-40-powerpc64-smp, linux-image-extra-3.13.0-40-generic, linux-image-3.13.0-40-generic-lpae, linux-image-3.13.0-40-lowlatency, linux-image-3.13.0-40-generic, linux-image-3.13.0-40-powerpc-e500mc
• USN-2464-1: linux-image-3.2.0-1458-omap4, linux-ti-omap4
• USN-2463-1: linux, linux-image-3.2.0-75-generic-pae, linux-image-3.2.0-75-generic, linux-image-3.2.0-75-virtual, linux-image-3.2.0-75-omap, linux-image-3.2.0-75-powerpc-smp, linux-image-3.2.0-75-highbank, linux-image-3.2.0-75-powerpc64-smp
• USN-2491-1: linux-ec2, linux-image-2.6.32-375-ec2
• USN-2462-1: linux-image-2.6.32-71-powerpc, linux, linux-image-2.6.32-71-powerpc-smp, linux-image-2.6.32-71-386, linux-image-2.6.32-71-preempt, linux-image-2.6.32-71-generic-pae, linux-image-2.6.32-71-sparc64, linux-image-2.6.32-71-sparc64-smp, linux-image-2.6.32-71-versatile, linux-image-2.6.32-71-virtual, linux-image-2.6.32-71-generic, linux-image-2.6.32-71-ia64, linux-image-2.6.32-71-powerpc64-smp, linux-image-2.6.32-71-server, linux-image-2.6.32-71-lpia