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Vulnerability of Pacemaker: privilege escalation via CIB IPC

Synthesis of the vulnerability 

An attacker can bypass restrictions via CIB IPC of Pacemaker, in order to escalate his privileges.
Impacted systems: Debian, Fedora, openSUSE Leap, Pacemaker, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 27/10/2020.
Références of this alert: CVE-2020-25654, DLA-2447-1, DLA-2447-2, DLA-2519-1, DSA-4791-1, FEDORA-2020-2cbe0089e2, FEDORA-2020-3d0e38b9e7, openSUSE-SU-2020:1782-1, openSUSE-SU-2020:1825-1, RHBUG-1888191, RHSA-2020:5423-01, RHSA-2020:5453-01, RHSA-2020:5487-01, SUSE-SU-2020:3054-1, SUSE-SU-2020:3073-1, SUSE-SU-2020:3080-1, SUSE-SU-2020:3086-1, SUSE-SU-2020:3089-1, SUSE-SU-2020:3094-1, USN-4623-1, VIGILANCE-VUL-33689.

Description of the vulnerability 

An attacker can bypass restrictions via CIB IPC of Pacemaker, in order to escalate his privileges.
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This threat impacts software or systems such as Debian, Fedora, openSUSE Leap, Pacemaker, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat 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 bulletin.

Solutions for this threat 

Pacemaker: version 2.0.5.
The version 2.0.5 is fixed:
  https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-2.0.5

Pacemaker: version 1.1.24.
The version 1.1.24 is fixed:
  https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-1.1.24

Pacemaker: patch for CIB IPC.
A patch is indicated in information sources.

Debian 10: new pacemaker packages.
New packages are available:
  Debian 10: pacemaker 2.0.1-5+deb10u1

Debian 9: new pacemaker packages (07/01/2021).
New packages are available:
  Debian 9: pacemaker 1.1.24-0+deb9u1

Debian 9: new pacemaker packages (12/11/2020).
New packages are available:
  Debian 9: pacemaker 1.1.16-1+deb9u2

Fedora 32, 33: new pacemaker packages.
New packages are available:
  Fedora 33: pacemaker 2.0.5-0.7.rc3.fc33
  Fedora 32: pacemaker 2.0.5-0.7.rc3.fc32

openSUSE Leap 15.1: new pacemaker packages.
New packages are available:
  openSUSE Leap 15.1: pacemaker 2.0.1+20190417.13d370ca9-lp151.2.16.4

openSUSE Leap 15.2: new pacemaker packages.
New packages are available:
  openSUSE Leap 15.2: pacemaker 2.0.4+20200616.2deceaa3a-lp152.2.3.1

RHEL 7.9: new pacemaker packages.
New packages are available:
  RHEL 7.9: pacemaker 1.1.23-1.el7_9.1

RHEL 8.2: new pacemaker packages.
New packages are available:
  RHEL 8.2: pacemaker 2.0.3-5.el8_2.3

RHEL 8.3: new pacemaker packages.
New packages are available:
  RHEL 8.3: pacemaker 2.0.4-6.el8_3.1

SUSE LE 12 SP3: new pacemaker packages.
New packages are available:
  SUSE LE 12 SP3: pacemaker 1.1.16-6.23.1

SUSE LE 12 SP4: new pacemaker packages.
New packages are available:
  SUSE LE 12 SP4: pacemaker 1.1.19+20181105.ccd6b5b10-3.22.1

SUSE LE 12 SP5: new pacemaker packages.
New packages are available:
  SUSE LE 12 SP5: pacemaker 1.1.23+20200622.28dd98fad-3.9.2

SUSE LE 15: new pacemaker packages.
New packages are available:
  SUSE LE 15 RTM: pacemaker 1.1.18+20180430.b12c320f5-3.27.1

SUSE LE 15 SP1: new pacemaker packages.
New packages are available:
  SUSE LE 15 SP1: pacemaker 2.0.1+20190417.13d370ca9-3.15.1

SUSE LE 15 SP2: new pacemaker packages.
New packages are available:
  SUSE LE 15 SP2: pacemaker 2.0.4+20200616.2deceaa3a-3.3.1

Ubuntu: new pacemaker packages.
New packages are available:
  Ubuntu 20.10: pacemaker 2.0.4-2ubuntu3.1
  Ubuntu 20.04 LTS: pacemaker 2.0.3-3ubuntu4.1
  Ubuntu 18.04 LTS: pacemaker 1.1.18-0ubuntu1.3
  Ubuntu 16.04 LTS: pacemaker 1.1.14-2ubuntu1.9
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