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Fencer Vulns
high 7.2

CVE-2020-25654 json

An ACL bypass flaw was found in pacemaker.

published 2020-11-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18318

cvss
7.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

An ACL bypass flaw was found in pacemaker. An attacker having a local account on the cluster and in the haclient group could use IPC communication with various daemons directly to perform certain tasks that they would be prevented by ACLs from doing if they went through the configuration.

Patch / fix

  • clusterlabs pacemaker 1.1.23, 2.0.3
  • pacemaker Debian 14, Debian 13, Debian 12 2.0.5~rc2-1

debian advisories DEBIAN-CVE-2020-25654

  • pacemaker Ubuntu 16.04 LTS 1.1.14-2ubuntu1.9
  • pacemaker Ubuntu 18.04 LTS 1.1.18-0ubuntu1.3
  • pacemaker Ubuntu 20.04 LTS 2.0.3-3ubuntu4.1

ubuntu advisories UBUNTU-CVE-2020-25654

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pacemaker RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-cli RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-cts RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-libs RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-remote RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-cluster-libs RHEL 7 1.1.23-1.el7_9.1
  • pacemaker-nagios-plugins-metadata RHEL 7 1.1.23-1.el7_9.1
  • pacemaker RHEL 8 2.0.4-6.el8_3.1

red hat advisories RHSA-2020:5453RHSA-2020:5487RHSA-2020:5423

  • pacemaker SLE High Availability Extension 12 SP3 1.1.16-6.23.1
  • pacemaker SLE High Availability Extension 12 SP4 1.1.19+20181105.ccd6b5b10-3.22.1
  • pacemaker SLE Software Development Kit 12 SP5, SLE High Availability Extension 12 SP5 1.1.23+20200622.28dd98fad-3.9.2
  • pacemaker SLE High Availability Extension 15 1.1.18+20180430.b12c320f5-3.27.1
  • pacemaker SLE High Availability Extension 15 SP1 2.0.1+20190417.13d370ca9-3.15.1
  • pacemaker SLE High Availability Extension 15 SP2 2.0.4+20200616.2deceaa3a-3.3.1

suse advisories SUSE-SU-2020:3094-1SUSE-SU-2020:3089-1SUSE-SU-2020:3086-1SUSE-SU-2020:3080-1SUSE-SU-2020:3073-1SUSE-SU-2020:3054-1

  • pacemaker openSUSE Leap 15.1 2.0.1+20190417.13d370ca9-lp151.2.16.4
  • pacemaker openSUSE Leap 15.2 2.0.4+20200616.2deceaa3a-lp152.2.3.1

opensuse advisories openSUSE-SU-2020:1825-1openSUSE-SU-2020:1782-1

  • pacemaker AlmaLinux 8 2.0.4-6.el8_3.1
  • pacemaker-cli AlmaLinux 8 2.0.4-6.el8_3.1
  • pacemaker-cts AlmaLinux 8 2.0.4-6.el8_3.1
  • pacemaker-remote AlmaLinux 8 2.0.4-6.el8_3.1
  • pacemaker-nagios-plugins-metadata AlmaLinux 8 2.0.4-6.el8_3.1

almalinux advisories ALSA-2020:5487

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-25654 updated cvss 7.2

pacemaker: ACL restrictions bypass

  • Red Hat Enterprise Linux 6 pacemaker, pacemaker-cli, pacemaker-cts, pacemaker-libs, pacemaker-remote, pacemaker-cluster-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Storage 3 pacemaker, pacemaker-cli, pacemaker-cts, pacemaker-libs, pacemaker-remote, pacemaker-cluster-libs
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) pacemaker 2.0.4-6.el8_3.1, pacemaker-libs 2.0.4-6.el8_3.1, pacemaker-schemas 2.0.4-6.el8_3.1, pacemaker-cluster-libs 2.0.4-6.el8_3.1
    fixed: vendor fix RHSA-2020:5487
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) pacemaker 2.0.3-5.el8_2.3, pacemaker-libs 2.0.3-5.el8_2.3, pacemaker-schemas 2.0.3-5.el8_2.3, pacemaker-cluster-libs 2.0.3-5.el8_2.3
    fixed: vendor fix RHSA-2020:5423
  • Red Hat Enterprise Linux High Availability (v. 8) pacemaker 2.0.4-6.el8_3.1, pacemaker-cli 2.0.4-6.el8_3.1, pacemaker-cts 2.0.4-6.el8_3.1, pacemaker-remote 2.0.4-6.el8_3.1, pacemaker-nagios-plugins-metadata 2.0.4-6.el8_3.1
    fixed: vendor fix RHSA-2020:5487
  • Red Hat Enterprise Linux High Availability EUS (v. 8.2) pacemaker 2.0.3-5.el8_2.3, pacemaker-cli 2.0.3-5.el8_2.3, pacemaker-cts 2.0.3-5.el8_2.3, pacemaker-remote 2.0.3-5.el8_2.3, pacemaker-nagios-plugins-metadata 2.0.3-5.el8_2.3
    fixed: vendor fix RHSA-2020:5423
  • Red Hat Enterprise Linux Resilient Storage (v. 8) pacemaker 2.0.4-6.el8_3.1, pacemaker-cli 2.0.4-6.el8_3.1, pacemaker-cts 2.0.4-6.el8_3.1, pacemaker-remote 2.0.4-6.el8_3.1, pacemaker-nagios-plugins-metadata 2.0.4-6.el8_3.1
    fixed: vendor fix RHSA-2020:5487
  • Red Hat Enterprise Linux Resilient Storage EUS (v. 8.2) pacemaker 2.0.3-5.el8_2.3, pacemaker-cli 2.0.3-5.el8_2.3, pacemaker-cts 2.0.3-5.el8_2.3, pacemaker-remote 2.0.3-5.el8_2.3, pacemaker-nagios-plugins-metadata 2.0.3-5.el8_2.3
    fixed: vendor fix RHSA-2020:5423
show 1 more
  • Red Hat Enterprise Linux Server High Availability (v. 7) pacemaker 1.1.23-1.el7_9.1, pacemaker-cli 1.1.23-1.el7_9.1, pacemaker-cts 1.1.23-1.el7_9.1, pacemaker-libs 1.1.23-1.el7_9.1, pacemaker-remote 1.1.23-1.el7_9.1, pacemaker-cluster-libs 1.1.23-1.el7_9.1, +1 more Red Hat Enterprise Linux Server Resilient Storage (v. 7) pacemaker 1.1.23-1.el7_9.1, pacemaker-cli 1.1.23-1.el7_9.1, pacemaker-cts 1.1.23-1.el7_9.1, pacemaker-libs 1.1.23-1.el7_9.1, pacemaker-remote 1.1.23-1.el7_9.1, pacemaker-cluster-libs 1.1.23-1.el7_9.1, +1 more
    fixed: vendor fix RHSA-2020:5453

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • n/a pacemaker

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.