Auth bypass in Clusterlabs Pacemaker
CVE-2018-16877
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Clusterlabs Pacemaker — versions affects up to and including Pacemaker-2.0.0
- Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 28, 29, 30
- openSUSE Leap — versions 15.0, 42.3
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Eus — versions 8.1, 8.2, 8.4
- Red Hat Enterprise Linux Server Aus — versions 8.2, 8.4, 8.6
- Red Hat Enterprise Linux Server Tus — versions 8.2, 8.4, 8.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- github.com/ClusterLabs/pacemaker/pull/1749 (Patch, Third Party Advisory)
- usn.ubuntu.com/3952-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/108042 (vdb-entry, Broken Link)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00012.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00034.html (vendor-advisory, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:1278 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-16877?
- CVE-2018-16877 is a high-severity vulnerability in Clusterlabs Pacemaker, classified under Improper Authentication. CVSS score: 7.8/10. Published 2019-04-18.
- How severe is CVE-2018-16877?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2018-16877 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.