Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 428
Alerts This Week
Warning Icon 1 428

Ubuntu 19.04: USN-4031-1 Critical: Kernel Information Exposure

ubuntu
Calendar Grey June 24, 2019
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-4032-1 describes an issue in the Linux kernel that could lead to unauthorized access to confidential information on systems using ARM architecture.
64-Bit PowerPC systems could be made to expose sensitive information.

Summary

64-Bit PowerPC systems could be made to expose sensitive information.

Software Description:

- linux: Linux kernel

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Linux kernel did not properly separate certain

memory mappings when creating new userspace processes on 64-bit Power

(ppc64el) systems. A local attacker could use this to access memory

contents or cause memory corruption of other processes on the system.

Topics%20covered

Topics Covered

security advisory information exposure ubuntu linux kernel local attacker

Update Instructions

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

Ubuntu 19.04:
  linux-image-5.0.0-19-generic    5.0.0-19.20
  linux-image-generic             5.0.0.19.20
  linux-image-virtual             5.0.0.19.20

Ubuntu 18.10:
  linux-image-4.18.0-24-generic   4.18.0-24.25
  linux-image-generic             4.18.0.24.25
  linux-image-powerpc-e500mc      4.18.0.24.25
  linux-image-powerpc-smp         4.18.0.24.25
  linux-image-powerpc64-emb       4.18.0.24.25
  linux-image-powerpc64-smp       4.18.0.24.25
  linux-image-virtual             4.18.0.24.25

Ubuntu 18.04 LTS:
  linux-image-4.18.0-24-generic   4.18.0-24.25~18.04.1
  linux-image-generic-hwe-18.04   4.18.0.24.74
  linux-image-virtual-hwe-18.04   4.18.0.24.74

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

https://ubuntu.com/security/notices/USN-4031-1

CVE-2019-12817

Severity
critical
Lowest
Low
Medium
High
Critical

June 24, 2019

Topics%20covered

Topics Covered

security advisory information exposure ubuntu linux kernel local attacker

Package Information

https://launchpad.net/ubuntu/+source/linux/5.0.0-19.20
https://launchpad.net/ubuntu/+source/linux/4.18.0-24.25
https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-24.25~18.04.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.