Security readout for executives and security teams
Some Juniper Junos MACsec configurations silently pad short CKN or CAK values with zeros. That weakens the effective secret and may make protected links easier to compromise, creating man-in-the-middle risk for organizations relying on MACsec for confidentiality and integrity. Most likely exposure is Juniper Networks devices running affected Junos OS releases with MACsec enabled and short CKN or CAK values configured. Organizations not using MACsec, or using fixed releases and full-length keys, are less likely to be exposed. Prioritize this where Juniper MACsec protects sensitive or critical links. The issue is configuration-dependent, but successful compromise could undermine encrypted link trust and enable man-in-the-middle impact. Treat as high priority for network infrastructure teams using affected Junos releases. Mitigation focus: Review Juniper JSA10854 for vendor-confirmed fixed releases and guidance.; Upgrade affected Junos OS releases to the fixed versions listed by Juniper or later.; Audit MACsec configurations for CKN values shorter than 64 digits..
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
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Open ATT&CK lookupCVE-2018-0021 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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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:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H2.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.juniper.net/JSA10854CVE reference · x_refsource_CONFIRM
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.