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01 Record

CVE-2018-0021

Junos OS: Short MacSec keys may allow man-in-the-middle attacks.

HighPUBLISHEDCNA: juniper
CNA base score8.8 CVSS v3.xCVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

02 Description

Junos OS: Short MacSec keys may allow man-in-the-middle attacks.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.59% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 48.4% of scored records. A rank, not a probability.
NVD base score
8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2018-04-11 19:00Z8 YR AGO
Last updated
2024-09-17 00:36Z2 YR AGO
Reserved
2017-11-16
Assigning CNA
juniper
Record state
PUBLISHED
Severity
High (CVSS 8.8)
CNA CVSS vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weaknesses
No CWE assigned
Data version
5.1
Document digest
433df40fc910f7abef5d84a2893fdb766fb00da4f043b3e7006cbc0a6351a760

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS14.1 to < 14.1R10, 14.1R9, 14.1X53 to < 14.1X53-D47, 15.1 to < 15.1R4-S9, 15.1R6-S6, 15.1R7, 15.1X49 to < 15.1X49-D100, 15.1X53 to < 15.1X53-D59, 16.1 to < 16.1R3-S8, 16.1R4-S8, 16.1R5, 16.2 to < 16.2R1-S6, 16.2R2, 17.1 to < 17.1R2—

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: 14.1R9, 14.1X53-D47, 15.1R4-S9, 15.1R6-S6, 15.1R7, 15.1X49-D100, 15.1X53-D59, 16.1R3-S8, 16.1R4-S8, 16.1R5, 16.2R1-S6, 16.2R2, 17.1R2, 17.2R1 and all subsequent releases.