USN-4068-1: Linux kernel vulnerabilities

23 July 2019

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Adam Zabrocki discovered that the Intel i915 kernel mode graphics driver in
the Linux kernel did not properly restrict mmap() ranges in some
situations. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-11085)

It was discovered that a race condition leading to a use-after-free existed
in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2019-11815)

It was discovered that the ext4 file system implementation in the Linux
kernel did not properly zero out memory in some situations. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2019-11833)

It was discovered that the Bluetooth Human Interface Device Protocol (HIDP)
implementation in the Linux kernel did not properly verify strings were
NULL terminated in certain situations. A local attacker could use this to
expose sensitive information (kernel memory). (CVE-2019-11884)

Update instructions

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

Ubuntu 18.04

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.

Related notices

  • USN-4076-1: linux-image-powerpc-smp-lts-xenial, linux-image-powerpc64-emb, linux-raspi2, linux-image-kvm, linux-image-powerpc-e500mc-lts-utopic, linux-image-generic-lpae-lts-wily, linux-image-generic, linux-image-4.4.0-1052-kvm, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc64-emb-lts-utopic, linux-image-virtual-lts-vivid, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-4.4.0-157-powerpc64-smp, linux-image-generic-lpae, linux-image-4.4.0-157-powerpc-e500mc, linux-image-4.4.0-1117-raspi2, linux-image-virtual, linux-image-4.4.0-1088-aws, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-xenial, linux-image-virtual-lts-utopic, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-157-generic-lpae, linux-image-powerpc-smp-lts-wily, linux-image-raspi2, linux-image-generic-lts-xenial, linux-image-generic-lts-utopic, linux-image-powerpc64-smp-lts-wily, linux-image-generic-lpae-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp, linux-image-4.4.0-157-powerpc64-emb, linux-image-4.4.0-157-powerpc-smp, linux-image-generic-lts-vivid, linux-kvm, linux-image-generic-lpae-lts-utopic, linux-image-generic-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-emb-lts-xenial, linux-image-aws, linux, linux-image-powerpc64-smp-lts-vivid, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-lowlatency-lts-wily, linux-aws, linux-image-lowlatency-lts-vivid, linux-image-virtual-lts-wily, linux-image-lowlatency, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-157-lowlatency, linux-image-4.4.0-157-generic, linux-image-powerpc-smp
  • USN-4008-1: linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-1047-kvm, linux-image-powerpc64-emb, linux-raspi2, linux-image-kvm, linux-image-powerpc-e500mc-lts-utopic, linux-image-generic-lpae-lts-wily, linux-snapdragon, linux-image-generic, linux-image-powerpc-e500mc-lts-wily, linux-image-virtual-lts-vivid, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc-smp-lts-utopic, linux-image-generic-lpae, linux-image-4.4.0-1084-aws, linux-image-virtual, linux-image-4.4.0-150-powerpc-smp, linux-image-powerpc-e500mc, linux-image-powerpc64-smp-lts-xenial, linux-image-virtual-lts-utopic, linux-image-powerpc-e500mc-lts-vivid, linux-image-4.4.0-1114-snapdragon, linux-image-4.4.0-150-powerpc-e500mc, linux-image-powerpc-smp-lts-wily, linux-image-raspi2, linux-image-generic-lts-xenial, linux-image-generic-lts-utopic, linux-image-powerpc64-smp-lts-wily, linux-image-generic-lpae-lts-vivid, linux-image-powerpc64-emb-lts-wily, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp, linux-image-4.4.0-150-powerpc64-smp, linux-image-generic-lts-vivid, linux-kvm, linux-image-generic-lpae-lts-utopic, linux-image-generic-lts-wily, linux-image-lowlatency-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-emb-lts-xenial, linux-image-aws, linux, linux-image-powerpc64-smp-lts-vivid, linux-image-4.4.0-1110-raspi2, linux-image-virtual-lts-xenial, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-150-generic, linux-image-lowlatency-lts-wily, linux-aws, linux-image-lowlatency-lts-vivid, linux-image-snapdragon, linux-image-virtual-lts-wily, linux-image-lowlatency, linux-image-4.4.0-150-generic-lpae, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-150-powerpc64-emb, linux-image-powerpc-smp, linux-image-4.4.0-150-lowlatency
  • USN-4069-2: linux-image-snapdragon-hwe-18.04, linux-image-5.0.0-23-generic, linux-hwe, linux-image-lowlatency-hwe-18.04, linux-image-5.0.0-23-generic-lpae, linux-image-5.0.0-23-lowlatency, linux-image-generic-lpae-hwe-18.04, linux-image-virtual-hwe-18.04, linux-image-generic-hwe-18.04
  • USN-4005-1: linux-image-5.0.0-1007-aws, linux-raspi2, linux-image-5.0.0-1007-gcp, linux-image-kvm, linux-snapdragon, linux-image-generic, linux-image-gke, linux-image-generic-lpae, linux-image-5.0.0-16-generic, linux-image-raspi2, linux-image-5.0.0-1013-snapdragon, linux-gcp, linux-kvm, linux-image-5.0.0-16-lowlatency, linux-image-aws, linux, linux-image-5.0.0-16-generic-lpae, linux-aws, linux-image-snapdragon, linux-image-lowlatency, linux-image-5.0.0-1007-kvm, linux-image-gcp, linux-image-5.0.0-1009-raspi2
  • USN-4068-2: linux-image-4.15.0-55-generic, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-1037-gcp, linux-image-oem, linux-image-virtual-hwe-16.04, linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-55-lowlatency, linux-gcp, linux-image-gke, linux-image-4.15.0-55-generic-lpae, linux-image-generic-hwe-16.04, linux-image-gcp, linux-hwe
  • USN-4118-1: linux-aws, linux-image-aws-hwe, linux-image-aws, linux-aws-hwe, linux-image-4.15.0-1047-aws
  • USN-4095-2: linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-159-powerpc64-smp, linux-image-4.4.0-159-lowlatency, linux-image-4.4.0-159-powerpc-e500mc, linux-image-4.4.0-159-powerpc-smp, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-159-generic-lpae, linux-lts-xenial, linux-image-generic-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-image-aws, linux-image-virtual-lts-xenial, linux-image-4.4.0-159-generic, linux-aws, linux-image-4.4.0-1050-aws, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-159-powerpc64-emb
  • USN-4008-3: linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-150-powerpc-smp, linux-image-powerpc64-smp-lts-xenial, linux-lts-xenial, linux-image-4.4.0-150-powerpc-e500mc, linux-image-generic-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-150-powerpc64-smp, linux-image-4.4.0-1045-aws, linux-image-powerpc64-emb-lts-xenial, linux-image-aws, linux-image-virtual-lts-xenial, linux-image-4.4.0-150-generic, linux-aws, linux-image-4.4.0-150-generic-lpae, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-150-powerpc64-emb, linux-image-4.4.0-150-lowlatency
  • USN-4069-1: linux-raspi2, linux-image-kvm, linux-snapdragon, linux-image-generic, linux-image-gke, linux-image-generic-lpae, linux-image-5.0.0-21-lowlatency, linux-image-virtual, linux-image-5.0.0-1011-gcp, linux-image-raspi2, linux-gcp, linux-image-5.0.0-1017-snapdragon, linux-image-azure, linux-image-5.0.0-1011-aws, linux-kvm, linux-image-5.0.0-21-generic, linux-image-5.0.0-1011-kvm, linux-image-aws, linux, linux-azure, linux-image-5.0.0-21-generic-lpae, linux-image-5.0.0-1013-raspi2, linux-aws, linux-image-snapdragon, linux-image-lowlatency, linux-image-gcp, linux-image-5.0.0-1012-azure