USN-3934-2: PolicyKit vulnerability

02 September 2019

PolicyKit could allow unintended access.

Releases

Packages

  • policykit-1 - framework for managing administrative policies and privileges

Details

USN-3934-1 fixed a vulnerability in Policykit. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

It was discovered that PolicyKit incorrectly relied on the fork() system
call in the Linux kernel being atomic. A local attacker could possibly use
this issue to gain access to services that have cached authorizations.

Update instructions

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

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

Related notices

  • USN-3901-2: linux-image-gcp, linux-image-4.15.0-1033-aws, linux-image-4.15.0-1040-azure, linux-image-aws-hwe, linux-image-oem, linux-image-generic-hwe-16.04, linux-image-lowlatency-hwe-16.04, linux-image-4.15.0-1028-gcp, linux-gcp, linux-image-4.15.0-46-generic, linux-aws-hwe, linux-image-4.15.0-46-lowlatency, linux-image-4.15.0-1009-oracle, linux-image-oracle, linux-image-virtual-hwe-16.04, linux-image-gke, linux-azure, linux-image-azure, linux-oracle, linux-image-generic-lpae-hwe-16.04, linux-image-4.15.0-46-generic-lpae, linux-hwe
  • USN-3910-1: linux-image-lowlatency-lts-xenial, linux-image-4.4.0-143-lowlatency, linux-image-virtual-lts-utopic, linux-image-virtual-lts-vivid, linux-image-4.4.0-143-powerpc-smp, linux-image-4.4.0-143-powerpc-e500mc, linux-image-powerpc64-emb-lts-vivid, linux-image-powerpc64-smp-lts-vivid, linux-image-4.4.0-1077-aws, linux-image-4.4.0-143-generic-lpae, linux-image-generic-lpae, linux-image-virtual, linux-snapdragon, linux-image-powerpc64-smp, linux-image-powerpc64-smp-lts-xenial, linux-image-generic-lts-vivid, linux-image-lowlatency, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-smp-lts-utopic, linux-image-raspi2, linux-image-powerpc-e500mc, linux-image-generic-lpae-lts-wily, linux-image-4.4.0-143-generic, linux-image-generic-lts-utopic, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-emb-lts-wily, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc-smp, linux-image-4.4.0-1104-raspi2, linux-image-generic-lpae-lts-xenial, linux-image-generic-lts-xenial, linux-image-4.4.0-1108-snapdragon, linux-raspi2, linux, linux-image-generic-lpae-lts-utopic, linux-image-4.4.0-143-powerpc64-smp, linux-image-lowlatency-lts-utopic, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-e500mc-lts-xenial, linux-kvm, linux-image-kvm, linux-image-powerpc64-emb-lts-utopic, linux-image-aws, linux-image-powerpc64-smp-lts-utopic, linux-image-lowlatency-lts-vivid, linux-image-lowlatency-lts-wily, linux-image-virtual-lts-xenial, linux-image-virtual-lts-wily, linux-image-generic-lts-wily, linux-image-generic, linux-image-powerpc-e500mc-lts-wily, linux-image-powerpc-smp-lts-vivid, linux-image-snapdragon, linux-image-generic-lpae-lts-vivid, linux-image-powerpc64-emb, linux-image-4.4.0-143-powerpc64-emb, linux-image-4.4.0-1041-kvm, linux-image-powerpc-smp-lts-wily, linux-aws, linux-image-powerpc-smp-lts-xenial
  • USN-3901-1: linux-image-4.15.0-1032-raspi2, linux-image-gcp, linux-image-4.15.0-1033-aws, linux-image-oem, linux-image-generic-lpae, linux-image-virtual, linux-image-generic-hwe-16.04, linux-image-4.15.0-1028-gcp, linux-image-lowlatency-hwe-16.04, linux-gcp, linux-image-lowlatency, linux-image-raspi2, linux-image-4.15.0-46-generic, linux-image-4.15.0-1030-kvm, linux-oem, linux-image-generic-hwe-16.04-edge, linux-image-4.15.0-46-lowlatency, linux-image-4.15.0-1034-oem, linux-image-4.15.0-1009-oracle, linux-image-generic-lpae-hwe-16.04-edge, linux-raspi2, linux-image-oracle, linux-image-virtual-hwe-16.04, linux, linux-kvm, linux-image-gke, linux-image-4.15.0-46-snapdragon, linux-image-kvm, linux-image-aws, linux-oracle, linux-image-generic, linux-image-generic-lpae-hwe-16.04, linux-image-snapdragon, linux-image-4.15.0-46-generic-lpae, linux-image-virtual-hwe-16.04-edge, linux-image-lowlatency-hwe-16.04-edge, linux-aws
  • USN-3908-1: linux-image-generic-pae, linux-image-omap, linux-image-generic-lts-saucy, linux-image-generic-lts-quantal, linux-image-3.13.0-166-lowlatency, linux-image-highbank, linux-image-generic-lpae, linux-image-3.13.0-166-powerpc64-emb, linux-image-virtual, linux-image-powerpc64-smp, linux-image-lowlatency, linux-image-3.13.0-166-powerpc-e500, linux-image-3.13.0-166-generic-lpae, linux-image-generic-lts-trusty, linux-image-3.13.0-166-powerpc-smp, linux-image-powerpc-e500mc, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-166-generic, linux-image-powerpc-smp, linux-image-generic-lpae-lts-saucy, linux-image-3.13.0-166-powerpc64-smp, linux, linux-image-generic-lts-raring, linux-image-3.13.0-166-powerpc-e500mc, linux-image-generic, linux-image-powerpc-e500, linux-image-powerpc64-emb, linux-image-lowlatency-pae
  • USN-3903-2: linux-azure, linux-image-azure, linux-image-4.18.0-16-generic-lpae, linux-image-4.18.0-16-generic, linux-image-4.18.0-1013-azure, linux-image-4.18.0-16-lowlatency, linux-image-generic-lpae-hwe-18.04, linux-image-4.18.0-16-snapdragon, linux-image-virtual-hwe-18.04, linux-image-generic-hwe-18.04, linux-image-lowlatency-hwe-18.04, linux-image-snapdragon-hwe-18.04, linux-hwe
  • USN-3934-1: gir1.2-polkit-1.0, libpolkit-gobject-1-0, libpolkit-backend-1-dev, libpolkit-agent-1-0, libpolkit-gobject-1-dev, policykit-1, policykit-1-doc, libpolkit-agent-1-dev, libpolkit-backend-1-0
  • USN-3903-1: linux-image-4.18.0-1007-gcp, linux-image-gcp, linux-image-4.18.0-1008-kvm, linux-image-4.18.0-1010-raspi2, linux-image-generic-lpae, linux-gcp, linux-image-lowlatency, linux-image-raspi2, linux-image-4.18.0-16-lowlatency, linux-image-4.18.0-1013-azure, linux-image-4.18.0-16-generic, linux-raspi2, linux, linux-kvm, linux-image-gke, linux-azure, linux-image-kvm, linux-image-azure, linux-image-4.18.0-16-generic-lpae, linux-image-4.18.0-16-snapdragon, linux-image-generic, linux-image-snapdragon
  • USN-3908-2: linux-image-3.13.0-166-generic, linux-lts-trusty, linux-image-3.13.0-166-generic-lpae, linux-image-generic-lts-trusty, linux-image-3.13.0-166-lowlatency, linux-image-generic-lpae-lts-trusty
  • USN-3910-2: linux-image-lowlatency-lts-xenial, linux-image-4.4.0-143-lowlatency, linux-image-4.4.0-143-powerpc-smp, linux-image-4.4.0-143-powerpc-e500mc, linux-image-4.4.0-143-generic-lpae, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-143-generic, linux-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-143-powerpc64-emb, linux-image-4.4.0-143-powerpc64-smp, linux-image-4.4.0-1039-aws, linux-image-powerpc-e500mc-lts-xenial, linux-image-virtual-lts-xenial, linux-image-aws, linux-image-generic-lts-xenial, linux-aws, linux-image-powerpc-smp-lts-xenial