Description
A flaw was found in the way pacemaker's client-server authentication was implemented in versions up to and including 2.0.0. A local attacker could use this flaw, and combine it with other IPC weaknesses, to achieve local privilege escalation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ClusterLabs | pacemaker | affects up to and including Pacemaker-2.0.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pacemaker | 2.0.1-3 | — |
| Debian 13 | pacemaker | 2.0.1-3 | — |
| Debian 12 | pacemaker | 2.0.1-3 | — |
| Debian 9 | pacemaker | 1.1.24-0+deb9u1 | DLA-2519-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | pacemaker | 1.1.18-0ubuntu1.1 | USN-3952-1 |
| Ubuntu 16.04 LTS | pacemaker | 1.1.14-2ubuntu1.6 | USN-3952-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | pacemaker +9 | 2.0.1-4.el8_0.3 | RHSA-2019:1279 |
| RHEL 7 | pacemaker +8 | 1.1.19-8.el7_6.5 | RHSA-2019:1278 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | pacemaker | 1.1.18+20180430.b12c320f5-3.9.4 | SUSE-SU-2019:1209-1 |
| SLES 12 SP4 | pacemaker | 1.1.19+20181105.ccd6b5b10-3.10.1 | SUSE-SU-2019:2268-1, SUSE-SU-2019:1047-1 |
| SLES 12 SP3 | pacemaker | 1.1.16-6.14.1 | SUSE-SU-2019:1108-1 |
| SLES 12 SP2 | pacemaker | 1.1.15-23.9.1 | SUSE-SU-2020:1072-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.0 | pacemaker | 1.1.18+20180430.b12c320f5-lp150.2.9.1 | openSUSE-SU-2019:1400-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | pacemaker +8 | 1.1.20-5.amzn2.0.2 | ALAS2-2019-1275 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | pacemaker-libs +2 | 2.0.1-4.el8_0.3 | ELSA-2019-1279 |
Advisories 13
- RHSA-2019:1279 Red Hat Security Advisory: pacemaker security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3952-1 pacemaker vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2519-1 pacemaker - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:1400-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2268-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1072-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1209-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1047-1 Security update for pacemaker SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2019:1278 Red Hat Security Advisory: pacemaker security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- SUSE-SU-2019:1108-1 Security update for pacemaker SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-2519 Red Hat Pacemaker: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 28, 2023
- ALAS2-2019-1275 Important: pacemaker security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 27, 2019
- ELSA-2019-1279 Important: pacemaker security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 30, 2019
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16877
- https://github.com/ClusterLabs/pacemaker/pull/1749
- USN-3952-1 vendor-advisory
- 108042 vdb-entry
- FEDORA-2019-e4c8de3fb7 vendor-advisory
- FEDORA-2019-e71f6f36ac vendor-advisory
- FEDORA-2019-b502250ba4 vendor-advisory
- openSUSE-SU-2019:1342 vendor-advisory
- openSUSE-SU-2019:1400 vendor-advisory
- RHSA-2019:1278 vendor-advisory
- RHSA-2019:1279 vendor-advisory
- [debian-lts-announce] 20210106 [SECURITY] [DLA 2519-1] pacemaker security update mailing-list
- GLSA-202309-09 vendor-advisory