USN-3420-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-gke - Linux kernel for Google Container Engine (GKE) systems
• linux-kvm - Linux kernel for cloud environments
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon processors

Details

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-1000251)

It was discovered that the Flash-Friendly File System (f2fs) implementation
in the Linux kernel did not properly validate superblock metadata. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-10663)

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN subsystem of the Linux kernel. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-12762)

Pengfei Wang discovered that a race condition existed in the NXP SAA7164 TV
Decoder driver for the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-8831)

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-1007-kvm - 4.4.0-1007.12
• linux-image-4.4.0-1031-gke - 4.4.0-1031.31
• linux-image-4.4.0-1035-aws - 4.4.0-1035.44
• linux-image-4.4.0-1074-raspi2 - 4.4.0-1074.82
• linux-image-4.4.0-1076-snapdragon - 4.4.0-1076.81
• linux-image-4.4.0-96-generic - 4.4.0-96.119
• linux-image-4.4.0-96-generic-lpae - 4.4.0-96.119
• linux-image-4.4.0-96-lowlatency - 4.4.0-96.119
• linux-image-4.4.0-96-powerpc-e500mc - 4.4.0-96.119
• linux-image-4.4.0-96-powerpc-smp - 4.4.0-96.119
• linux-image-4.4.0-96-powerpc64-emb - 4.4.0-96.119
• linux-image-4.4.0-96-powerpc64-smp - 4.4.0-96.119

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

• CVE-2017-1000251
• CVE-2017-10663
• CVE-2017-12762
• CVE-2017-8831

Related notices

• USN-3423-1: linux-image-3.2.0-131-highbank, linux-image-3.2.0-131-powerpc-smp, linux-image-virtual, linux-image-powerpc64-smp, linux-image-3.2.0-131-virtual, linux, linux-image-3.2.0-131-generic, linux-image-3.2.0-131-generic-pae, linux-image-3.2.0-131-powerpc64-smp, linux-image-generic, linux-image-powerpc-smp, linux-image-highbank, linux-image-omap, linux-image-generic-pae, linux-image-3.2.0-131-omap
• USN-3419-1: linux-image-4.10.0-35-generic, linux-image-4.10.0-1018-raspi2, linux, linux-image-4.10.0-35-generic-lpae, linux-image-lowlatency, linux-image-generic, linux-image-generic-lpae, linux-image-raspi2, linux-image-4.10.0-35-lowlatency, linux-raspi2
• USN-3420-2: linux-image-4.4.0-96-lowlatency, linux-image-extra-4.4.0-96-generic, linux-image-4.4.0-96-generic, linux-image-4.4.0-96-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-96-generic-lpae, linux-image-4.4.0-96-powerpc64-smp, linux-image-4.4.0-96-powerpc64-emb, linux-image-4.4.0-96-powerpc-e500mc
• USN-3419-2: linux-image-4.10.0-35-generic, linux-hwe, linux-image-extra-4.10.0-35-generic, linux-image-4.10.0-35-generic-lpae, linux-image-4.10.0-35-lowlatency
• USN-3422-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3422-1: linux-image-3.13.0-132-powerpc64-emb, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-image-3.13.0-132-powerpc-e500mc, linux, linux-image-extra-3.13.0-132-generic, linux-image-3.13.0-132-powerpc64-smp, linux-image-3.13.0-132-lowlatency, linux-image-3.13.0-132-powerpc-e500, linux-image-3.13.0-132-powerpc-smp
• USN-3468-2: linux-image-4.10.0-38-generic, linux-hwe, linux-image-4.10.0-38-generic-lpae, linux-image-4.10.0-38-lowlatency, linux-image-extra-4.10.0-38-generic
• USN-3468-3: linux-image-extra-4.10.0-1008-gcp, linux-gcp, linux-image-4.10.0-1008-gcp
• USN-3470-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-135-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-135-generic
• USN-3470-1: linux-image-3.13.0-135-lowlatency, linux-image-3.13.0-135-powerpc64-smp, linux, linux-image-3.13.0-135-generic-lpae, linux-image-3.13.0-135-powerpc64-emb, linux-image-3.13.0-135-powerpc-e500, linux-image-extra-3.13.0-135-generic, linux-image-3.13.0-135-powerpc-e500mc, linux-image-3.13.0-135-powerpc-smp, linux-image-3.13.0-135-generic
• USN-3468-1: linux-image-4.10.0-38-generic, linux, linux-image-lowlatency, linux-image-4.10.0-38-generic-lpae, linux-image-4.10.0-38-lowlatency, linux-image-generic, linux-image-generic-lpae, linux-image-raspi2, linux-image-4.10.0-1020-raspi2, linux-raspi2
• USN-3620-1: linux-image-3.13.0-144-generic, linux-image-3.13.0-144-powerpc-e500mc, linux-image-3.13.0-144-lowlatency, linux, linux-image-3.13.0-144-powerpc-smp, linux-image-3.13.0-144-generic-lpae, linux-image-3.13.0-144-powerpc-e500, linux-image-3.13.0-144-powerpc64-smp, linux-image-3.13.0-144-powerpc64-emb, linux-image-extra-3.13.0-144-generic
• USN-3620-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-144-generic, linux-image-3.13.0-144-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3754-1: linux-image-extra-3.13.0-157-generic, linux-image-3.13.0-157-powerpc64-smp, linux, linux-image-3.13.0-157-powerpc-e500mc, linux-image-3.13.0-157-generic-lpae, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-generic, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-powerpc-smp