Read the docs
TI-2020-15671 Aliases CVE-2020-25654GHSA-3q2f-h5rm-7qv7

Improper access control in pacemaker

Priority LOW 35CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 8 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-284.

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.

Why it matters now

EPSS 0.01868 79th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 8 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—pacemakerpacemaker 1.1.24-rc1, pacemaker 2.0.5-rc2—No fix listedCNA
  • pacemaker Vendor— Affected pacemaker 1.1.24-rc1, pacemaker 2.0.5-rc2 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:clusterlabs:pacemaker:*:*:*:*:*:*:*:*before 1.1.23; 2.0.0 to before 2.0.3VulnerableClusterLabs
cpe:2.3:a:clusterlabs:pacemaker:2.0.5:rc1:*:*:*:*:*:*2.0.5 rc1VulnerableClusterLabs
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:clusterlabs:pacemaker:*:*:*:*:*:*:*:* Versions before 1.1.23; 2.0.0 to before 2.0.3 Vulnerable ·ClusterLabs
  • cpe:2.3:a:clusterlabs:pacemaker:2.0.5:rc1:*:*:*:*:*:* Versions 2.0.5 rc1 Vulnerable ·ClusterLabs
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2020:5487 Released 2020-12-15 · Red Hat rating Moderate
    pacemaker security update
    • Red Hat Enterprise Linux AppStream (v. 8) pacemaker-2.0.4-6.el8_3.1, pacemaker-cluster-libs-2.0.4-6.el8_3.1, pacemaker-libs-2.0.4-6.el8_3.1 +1
    • 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 +4
    • 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 +4
  • RHSA-2020:5453 Released 2020-12-15 · Red Hat rating Moderate
    pacemaker security update
    • 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-cluster-libs-1.1.23-1.el7_9.1 +6
    • 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-cluster-libs-1.1.23-1.el7_9.1 +6
  • RHSA-2020:5423 Released 2020-12-15 · Red Hat rating Moderate
    pacemaker security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) pacemaker-2.0.3-5.el8_2.3, pacemaker-cluster-libs-2.0.3-5.el8_2.3, pacemaker-libs-2.0.3-5.el8_2.3 +1
    • 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 +4
    • 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 +4

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Storage 3AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:5487
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2020:5423
Red Hat Enterprise Linux High Availability (v. 8)Fixed RHSA-2020:5487
Red Hat Enterprise Linux High Availability EUS (v. 8.2)Fixed RHSA-2020:5423
Red Hat Enterprise Linux Resilient Storage (v. 8)Fixed RHSA-2020:5487
Red Hat Enterprise Linux Resilient Storage EUS (v. 8.2)Fixed RHSA-2020:5423
Red Hat Enterprise Linux Server High Availability (v. 7)Fixed RHSA-2020:5453
Red Hat Enterprise Linux Server Resilient Storage (v. 7)Fixed RHSA-2020:5453

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-25654
  2. 2026-10-03 Alias added: GHSA-3q2f-h5rm-7qv7

References

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences