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Vulnerability of Linux kernel: read-write access via PowerPC Processes Memory

Synthesis of the vulnerability 

An attacker can bypass access restrictions via PowerPC Processes Memory of the Linux kernel, in order to read or alter data.
Vulnerable software: Debian, Fedora, Linux, openSUSE Leap, RHEL, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 25/06/2019.
Références of this computer vulnerability: CERTFR-2019-AVI-293, CERTFR-2019-AVI-306, CERTFR-2019-AVI-381, CERTFR-2019-AVI-428, CERTFR-2019-AVI-458, CVE-2019-12817, DSA-4495-1, FEDORA-2019-6817686c4d, FEDORA-2019-69c132b061, openSUSE-SU-2019:1757-1, RHSA-2019:2703-01, SUSE-SU-2019:1744-1, SUSE-SU-2019:2430-1, USN-4031-1, VIGILANCE-VUL-29611.

Description of the vulnerability 

An attacker can bypass access restrictions via PowerPC Processes Memory of the Linux kernel, in order to read or alter data.
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This security vulnerability impacts software or systems such as Debian, Fedora, Linux, openSUSE Leap, RHEL, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a specialist ability can exploit this security note.

Solutions for this threat 

Linux kernel: version 5.1.15.
The version 5.1.15 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.56.
The version 4.19.56 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for PowerPC Processes Memory.
A patch is indicated in information sources.

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.37-5+deb10u2

Fedora: new kernel-headers packages.
New packages are available:
  Fedora 29: kernel-headers 5.1.15-200.fc29
  Fedora 30: kernel-headers 5.1.15-300.fc30

Fedora: new kernel packages.
New packages are available:
  Fedora 29: kernel 5.1.15-200.fc29
  Fedora 30: kernel 5.1.15-300.fc30

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel debug-4.12.14-lp151.28.10.1

RHEL 8.0: new kernel packages.
New packages are available:
  RHEL 8: kernel 4.18.0-80.11.1.el8_0

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.7.1

SUSE LE 15 SP1: new kernel-source-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-source-rt 4.12.14-14.8.1

Ubuntu: new linux-image-generic packages.
New packages are available:
  Ubuntu 19.04: linux-image-generic 5.0.0.19.20
  Ubuntu 18.10: linux-image-generic 4.18.0.24.25
  Ubuntu 18.04 LTS: linux-image-generic hwe-18.04 4.18.0.24.74

Wind River Linux: version 10.18.44.9.
The version 10.18.44.9 is fixed:
  https://support2.windriver.com/
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