A flaw was found in the way pacemaker's client-server authentication was implemented in versions up to and including 2.0.0.
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.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Apr 18, 2019
- Updated
- Jun 16, 2026
- EPSS
- 0.4% · 32th percentile
- CWE
- CWE-287
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CNA vs NVD score
- NVD
- 7.8
- CNA · redhat
- 8.8
- 1.0 point gap
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| clusterlabs | pacemaker | cpe:2.3:a:clusterlabs:pacemaker |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux18.10
- canonical ubuntu linux19.04
- clusterlabs pacemakerup to 2.0.0 inclusive
- debian debian linux9.0
- fedoraproject fedora28
- fedoraproject fedora29
- fedoraproject fedora30
- opensuse leap15.0
- opensuse leap42.3
- redhat enterprise linux8.0
- redhat enterprise linux eus8.1
- redhat enterprise linux eus8.2
- redhat enterprise linux eus8.4
- redhat enterprise linux eus8.6
- redhat enterprise linux server aus8.2
- redhat enterprise linux server aus8.4
- redhat enterprise linux server aus8.6
- redhat enterprise linux server tus8.2
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
ClusterLabs pacemaker
- affects up to and including Pacemaker-2.0.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | pacemaker | before 2.0.1-3 | 2.0.1-3 |
| Debian:9 | pacemaker | before 1.1.24-0+deb9u1 | 1.1.24-0+deb9u1 |
| openSUSE:Leap 15.0 | pacemaker | before 1.1.18+20180430.b12c320f5-lp150.2.9.1 | 1.1.18+20180430.b12c320f5-lp150.2.9.1 |
| Red Hat:enterprise_linux:7::server | pacemaker | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-cli | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-cluster-libs | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-cts | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-debuginfo | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-doc | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-libs | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-libs-devel | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-nagios-plugins-metadata | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:7::server | pacemaker-remote | before 0:1.1.19-8.el7_6.5 | 0:1.1.19-8.el7_6.5 |
| Red Hat:enterprise_linux:8::appstream | pacemaker | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-cli-debuginfo | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-cluster-libs | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-cluster-libs-debuginfo | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-debuginfo | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-debugsource | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-libs | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-libs-debuginfo | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-remote-debuginfo | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::appstream | pacemaker-schemas | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
| Red Hat:enterprise_linux:8::highavailability | pacemaker-cli | before 0:2.0.1-4.el8_0.3 | 0:2.0.1-4.el8_0.3 |
+10
Same product
clusterlabs: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-3885A use-after-free flaw was found in pacemaker up to and including version 2.0.1 which could result in certain sensitive information to be lea31Monitor
- CVE-2016-7035An authorization flaw was found in Pacemaker before 1.1.16, where it did not properly guard its IPC interface.31Monitor
- CVE-2016-7797Pacemaker before 1.1.15, when using pacemaker remote, might allow remote attackers to cause a denial of service (node disconnection) via an 31Monitor
- CVE-2020-25654An ACL bypass flaw was found in pacemaker.29Monitor
- CVE-2011-5271Pacemaker before 1.1.6 configure script creates temporary files insecurely22Monitor
- CVE-2018-16878A flaw was found in pacemaker up to and including version 2.0.1.22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:pacemaker | 2.0.1-3 · Debian:12 | Package registry (OSV) |
| opensuse:pacemaker | 1.1.18+20180430.b12c320f5-lp150.2.9.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:pacemaker | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-cli | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-cli-debuginfo | 0:2.0.1-4.el8_0.3 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:pacemaker-cluster-libs | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-cluster-libs-debuginfo | 0:2.0.1-4.el8_0.3 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:pacemaker-cts | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-debuginfo | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-doc | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-libs | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-libs-devel | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-nagios-plugins-metadata | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:pacemaker-remote | 0:1.1.19-8.el7_6.5 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| suse:pacemaker | 1.1.19+20181105.ccd6b5b10-3.10.1 · SUSE:Linux Enterprise High Availability Extension 12 SP4 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-287 · Improper AuthenticationCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Root cause
Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.
The bug in code
The whole CWE-287 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);Fixed
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Authentication AbuseCAPEC-114Medium
- Authentication BypassCAPEC-115Medium
- Identity SpoofingCAPEC-151likelihood: Medium · Medium
- Fake the Source of DataCAPEC-194Medium
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- Utilizing REST's Trust in the System Resource to Obtain Sensitive DataCAPEC-57likelihood: Medium · Very High
- Session HijackingCAPEC-593likelihood: High · Very High
- Token ImpersonationCAPEC-633Medium
ATT&CK techniques
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00012.html
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00034.html
- www.securityfocus.com/bid/108042
- access.redhat.com/errata/RHSA-2019:1278
- access.redhat.com/errata/RHSA-2019:1279
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16877
- github.com/ClusterLabs/pacemaker/pull/1749
- lists.debian.org/debian-lts-announce/2021/01/msg00007.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GCWFO7GL6MBU6C4BGFO3P6L77DIBBF3/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FY4M4RMIG2POKC6OOFQODGKPRYXHET2F/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HR6QUYGML735EI3HEEHYRDW7EG73BUH2/
- security.gentoo.org/glsa/202309-09
- usn.ubuntu.com/3952-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.