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Vulnerability of Linux kernel: information disclosure via proc_pid_stack

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via proc_pid_stack() of the Linux kernel, in order to obtain sensitive information.
Vulnerable systems: Debian, BIG-IP Hardware, TMOS, Fedora, Junos Space, Linux, openSUSE Leap, RHEL, SIMATIC, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 04/10/2018.
Références of this weakness: 1798863, CERTFR-2018-AVI-557, CERTFR-2018-AVI-581, CERTFR-2018-AVI-583, CERTFR-2019-AVI-035, CERTFR-2019-AVI-041, CERTFR-2019-AVI-044, CERTFR-2019-AVI-112, CERTFR-2019-AVI-183, CERTFR-2019-AVI-390, CVE-2018-17972, DLA-1715-1, DLA-1731-1, DLA-1731-2, FEDORA-2018-2ee3411cb8, FEDORA-2018-9f4381d8c4, FEDORA-2018-ec3bf1b228, JSA10993, K27673650, openSUSE-SU-2019:1407-1, RHSA-2019:0512-01, RHSA-2019:0514-01, RHSA-2019:0831-01, RHSA-2019:2473-01, SSA:2019-030-01, SSB-439005, SUSE-SU-2019:14089-1, SUSE-SU-2019:1527-1, SUSE-SU-2019:1532-1, SUSE-SU-2019:1533-1, SUSE-SU-2019:1534-1, SUSE-SU-2019:1692-1, USN-3821-1, USN-3821-2, USN-3832-1, USN-3835-1, USN-3871-1, USN-3871-2, USN-3871-3, USN-3871-4, USN-3871-5, USN-3880-1, USN-3880-2, VIGILANCE-VUL-27416.

Description of the vulnerability 

An attacker can bypass access restrictions to data via proc_pid_stack() of the Linux kernel, in order to obtain sensitive information.
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This vulnerability bulletin impacts software or systems such as Debian, BIG-IP Hardware, TMOS, Fedora, Junos Space, Linux, openSUSE Leap, RHEL, SIMATIC, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security note is medium.

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

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

Linux kernel: version 4.18.13.
The version 4.18.13 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.75.
The version 4.14.75 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.132.
The version 4.9.132 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.160.
The version 4.4.160 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.18.124.
The version 3.18.124 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: version 3.16.62.
The version 3.16.62 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: patch for proc_pid_stack.
A patch is indicated in information sources.

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.144-3.1~deb8u1

Debian 8: new linux packages (27/03/2019).
New packages are available:
  Debian 8: linux 3.16.64-2

F5 BIG-IP: solution for Linux.
The solution is indicated in information sources.

Fedora 29: new kernel packages.
New packages are available:
  Fedora 29: kernel 4.18.13-300.fc29

Fedora: new kernel-headers packages.
New packages are available:
  Fedora 27: kernel-headers 4.18.13-100.fc27
  Fedora 28: kernel-headers 4.18.13-200.fc28
  Fedora 29: kernel-headers 4.18.13-300.fc29

Fedora: new kernel-tools packages.
New packages are available:
  Fedora 27: kernel-tools 4.18.13-100.fc27
  Fedora 28: kernel-tools 4.18.13-200.fc28
  Fedora 29: kernel-tools 4.18.13-300.fc29

Junos Space: version 19.4R1.
The version 19.4R1 is fixed:
  https://www.juniper.net/support/downloads/

openSUSE Leap 42.3: new kernel packages.
New packages are available:
  openSUSE Leap 42.3: kernel 4.4.179-99.1

RHEL 6: new kernel packages.
New packages are available:
  RHEL 6: kernel 2.6.32-754.18.2.el6

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7: kernel-alt 4.14.0-115.7.1.el7a

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7: kernel 3.10.0-957.10.1.el7

RHEL 7: new kernel-rt packages.
New packages are available:
  RHEL 7: kernel-rt 3.10.0-957.10.1.rt56.921.el7

SIMATIC S7-1500 CPU 1518: workaround for GNU/Linux Vulnerabilities.
A workaround is indicated in the information source.

Slackware: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.172-i586-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.95.2

SUSE LE 12 RTM: new kernel packages.
New packages are available:
  SUSE LE 12 RTM: kernel 3.12.61-52.154.1

SUSE LE 12 SP1: new kernel packages (18/06/2019).
New packages are available:
  SUSE LE 12 SP1: kernel 3.12.74-60.64.115.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.114.1

SUSE LE 12 SP3: new kernel packages.
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.97.1

Ubuntu 18.04: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.45.66
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0-45.48

Ubuntu 18.10: new linux-image-4.18.0 packages.
New packages are available:
  Ubuntu 18.10: linux-image-generic 4.18.0.12.13

Ubuntu 18.10: new linux-image-aws packages.
New packages are available:
  Ubuntu 18.10: linux-image-aws 4.18.0.1006.6

Ubuntu: new linux-image-3.13.0 packages.
New packages are available:
  Ubuntu 12.04 ESM: linux-image-generic-lts-trusty 3.13.0.165.155
  Ubuntu 14.04 LTS: linux-image-generic 3.13.0.165.175

Ubuntu: new linux-image-4.4.0-139-generic packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-4.4.0-139-generic 4.4.0-139.165
  Ubuntu 14.04 LTS: linux-image-4.4.0-139-generic 4.4.0-139.165~14.04.1

Wind River Linux: solution (21/05/2019).
The solution is indicated in information sources.
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