USN-4008-1: Linux kernel vulnerabilities

04 June 2019

Several security issues were fixed in the Linux kernel.

Releases

Packages

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

Details

Robert Święcki discovered that the Linux kernel did not properly apply
Address Space Layout Randomization (ASLR) in some situations for setuid elf
binaries. A local attacker could use this to improve the chances of
exploiting an existing vulnerability in a setuid elf binary.
(CVE-2019-11190)

It was discovered that a null pointer dereference vulnerability existed in
the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash). (CVE-2019-11810)

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)

Federico Manuel Bento discovered that the Linux kernel did not properly
apply Address Space Layout Randomization (ASLR) in some situations for
setuid a.out binaries. A local attacker could use this to improve the
chances of exploiting an existing vulnerability in a setuid a.out binary.
(CVE-2019-11191)

As a hardening measure, this update disables a.out support.

Update instructions

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

Ubuntu 16.04

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-4008-3: linux-lts-xenial, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-150-generic-lpae, linux-image-generic-lts-xenial, linux-image-4.4.0-150-lowlatency, linux-image-4.4.0-150-generic, linux-aws, linux-image-generic-lpae-lts-xenial, linux-image-aws, linux-image-4.4.0-1045-aws
  • USN-4007-2: linux-image-virtual-hwe-16.04, linux-image-4.15.0-1014-oracle, linux-image-oracle, linux-image-generic-lpae-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-image-oem, linux-oracle, linux-image-generic-hwe-16.04, linux-aws-hwe, linux-hwe, linux-image-aws-hwe, linux-image-4.15.0-51-generic-lpae, linux-image-4.15.0-51-generic, linux-image-4.15.0-51-lowlatency, linux-image-4.15.0-1040-aws
  • USN-4006-2: linux-image-lowlatency-hwe-18.04, linux-image-4.18.0-21-snapdragon, linux-image-generic-hwe-18.04, linux-hwe, linux-image-snapdragon-hwe-18.04, linux-image-4.18.0-21-generic-lpae, linux-image-generic-lpae-hwe-18.04, linux-image-4.18.0-21-lowlatency, linux-image-4.18.0-21-generic
  • USN-4115-1: linux-image-virtual-hwe-16.04, linux-image-4.15.0-1043-kvm, linux-image-4.15.0-60-generic, linux, linux-image-gcp, linux-gcp, linux-image-powerpc-e500mc, linux-image-raspi2, linux-image-powerpc64-smp, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-60-lowlatency, linux-image-4.15.0-1044-raspi2, linux-azure, linux-image-kvm, linux-image-virtual, linux-image-4.15.0-1041-gcp, linux-image-powerpc64-emb, linux-image-gke, linux-image-lowlatency, linux-image-generic, linux-gke-4.15, linux-kvm, linux-image-oracle, linux-image-generic-lpae-hwe-16.04, linux-oracle, linux-image-generic-hwe-16.04, linux-hwe, linux-image-powerpc-smp, linux-image-gke-4.15, linux-image-azure, linux-image-generic-lpae, linux-image-4.15.0-60-generic-lpae, linux-image-4.15.0-1041-gke, linux-image-oem, linux-raspi2, linux-image-4.15.0-1056-azure, linux-image-4.15.0-1022-oracle
  • USN-4008-2: apparmor-profiles, python3-apparmor, apparmor
  • USN-4006-1: linux, linux-image-4.18.0-21-snapdragon, linux-image-gcp, linux-gcp, linux-image-4.18.0-1012-gcp, linux-aws, linux-image-4.18.0-1013-kvm, linux-image-raspi2, linux-image-4.18.0-21-generic-lpae, linux-image-kvm, linux-image-gke, linux-image-lowlatency, linux-image-generic, linux-kvm, linux-image-snapdragon, linux-image-4.18.0-21-lowlatency, linux-image-generic-lpae, linux-image-aws, linux-raspi2, linux-image-4.18.0-1015-raspi2, linux-image-4.18.0-21-generic, linux-image-4.18.0-1017-aws
  • USN-4007-1: linux-image-4.15.0-1014-oracle, linux, linux-image-gcp, linux-gcp, linux-image-4.15.0-1035-kvm, linux-image-4.15.0-1037-raspi2, linux-image-4.15.0-51-generic-lpae, linux-image-4.15.0-51-generic, linux-aws, linux-image-raspi2, linux-image-4.15.0-1040-aws, linux-image-4.15.0-1033-gcp, linux-snapdragon, linux-oem, linux-image-kvm, linux-image-lowlatency, linux-image-generic, linux-kvm, linux-image-oracle, linux-oracle, linux-image-snapdragon, linux-image-generic-lpae, linux-image-aws, linux-image-4.15.0-1039-oem, linux-image-oem, linux-raspi2, linux-image-4.15.0-51-lowlatency, linux-image-4.15.0-1054-snapdragon
  • USN-4068-1: linux-image-4.15.0-1037-gcp, linux-image-4.15.0-1018-oracle, linux, linux-image-gcp, linux-gcp, linux-image-4.15.0-1044-aws, linux-image-powerpc-e500mc, linux-image-4.15.0-55-generic-lpae, linux-image-4.15.0-1058-snapdragon, linux-aws, linux-image-raspi2, linux-snapdragon, linux-image-powerpc64-smp, linux-image-kvm, linux-image-virtual, linux-image-powerpc64-emb, linux-image-4.15.0-55-lowlatency, linux-image-lowlatency, linux-image-generic, linux-kvm, linux-image-oracle, linux-oracle, linux-image-powerpc-smp, linux-image-snapdragon, linux-image-generic-lpae, linux-image-aws, linux-image-4.15.0-55-generic, linux-raspi2, linux-image-4.15.0-1039-kvm, linux-image-4.15.0-1041-raspi2
  • USN-4005-1: linux-image-5.0.0-16-lowlatency, linux, linux-image-gcp, linux-gcp, linux-image-5.0.0-1013-snapdragon, linux-aws, linux-image-raspi2, linux-image-5.0.0-1007-kvm, linux-image-5.0.0-16-generic, linux-snapdragon, linux-image-kvm, linux-image-gke, linux-image-lowlatency, linux-image-generic, linux-kvm, linux-image-snapdragon, linux-image-generic-lpae, linux-image-aws, linux-image-5.0.0-1007-aws, linux-image-5.0.0-1007-gcp, linux-raspi2, linux-image-5.0.0-1009-raspi2, linux-image-5.0.0-16-generic-lpae
  • USN-4068-2: linux-image-virtual-hwe-16.04, linux-image-4.15.0-1037-gcp, linux-image-4.15.0-55-generic, linux-image-generic-lpae-hwe-16.04, linux-image-gcp, linux-image-lowlatency-hwe-16.04, linux-image-oem, linux-gcp, linux-image-generic-hwe-16.04, linux-hwe, linux-image-4.15.0-55-generic-lpae, linux-image-4.15.0-55-lowlatency, linux-image-gke
  • USN-4118-1: linux-aws-hwe, linux-image-aws-hwe, linux-aws, linux-image-4.15.0-1047-aws, linux-image-aws