Security readout for executives and security teams
Pacemaker, software used to run high-availability Linux clusters, had a client-server authentication flaw. A local low-privileged attacker could combine it with other IPC weaknesses to gain higher privileges on affected cluster nodes. Most relevant exposure is Linux high-availability cluster nodes running Pacemaker packages at or below the affected range, especially systems where non-administrative local users can log in or run local processes. Treat this as high priority for production HA clusters. It is not remotely exploitable from the sources provided, but a local foothold on a cluster node could become full compromise and affect service availability. Mitigation focus: Inventory all Pacemaker installations across cluster nodes.; Apply the relevant vendor security update for each Linux distribution.; Prioritize systems running Pacemaker up to and including 2.0.0..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-16877 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H26Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16877CVE reference
- https://github.com/ClusterLabs/pacemaker/pull/1749CVE reference
- USN-3952-1CVE reference · vendor-advisory
- FEDORA-2019-e4c8de3fb7CVE reference · vendor-advisory
- FEDORA-2019-e71f6f36acCVE reference · vendor-advisory
- FEDORA-2019-b502250ba4CVE reference · vendor-advisory
- RHSA-2019:1278CVE reference · vendor-advisory
- RHSA-2019:1279CVE reference · vendor-advisory
- [debian-lts-announce] 20210106 [SECURITY] [DLA 2519-1] pacemaker security updateCVE reference · mailing-list
- GLSA-202309-09CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.