Ubuntu Security Notices
USN-3908-2

USN-3908-2: Linux kernel (Trusty HWE) vulnerability

Publication date

13 March 2019

Overview

The system could be made to run programs as an administrator.

Releases

12.04

Packages

linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Jann Horn discovered a race condition in the fork() system call in the
Linux kernel. A local attacker could use this to gain access to services
that cache authorizations.

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release	Package Version
12.04 precise	linux-image-3.13.0-166-lowlatency – 3.13.0-166.216~precise1
	linux-image-3.13.0-166-generic – 3.13.0-166.216~precise1
	linux-image-3.13.0-166-generic-lpae – 3.13.0-166.216~precise1
	linux-image-generic-lpae-lts-trusty – 3.13.0.166.156
	linux-image-generic-lts-trusty – 3.13.0.166.156

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References

CVE-2019-6133

CVE-2019-6133

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