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TI-2018-00021 Aliases CVE-2018-0021GHSA-cm2c-mr99-4v22

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

Priority LOW 39Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA.

Summary

If all 64 digits of the connectivity association name (CKN) key or all 32 digits of the connectivity association key (CAK) key are not configured, all remaining digits will be auto-configured to 0. Hence, Juniper devices configured with short MacSec keys are at risk to an increased likelihood that an attacker will discover the secret passphrases configured for these keys through dictionary-based and brute-force-based attacks using spoofed packets. Affected releases are Juniper Networks Junos OS: 14.1 versions prior to 14.1R10, 14.1R9; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D100; 15.1X53 versions prior to 15.1X53-D59; 16.1 versions prior to 16.1R3-S8, 16.1R4-S8, 16.1R5; 16.2 versions prior to 16.2R1-S6, 16.2R2; 17.1 versions prior to 17.1R2.

Why it matters now

EPSS 0.00599 48th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 14.1R10, 14.1R9, 14.1X53-D47 +11

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS14.1 to before 14.1R10, 14.1R9; 14.1X53 to before 14.1X53-D47; 15.1 to before 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 to before 15.1X49-D100; 15.1X53 to before 15.1X53-D59; 16.1 to before 16.1R3-S8, 16.1R4-S8, 16.1R5; 16.2 to before 16.2R1-S6, 16.2R2; 17.1 to before 17.1R214.1R10, 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, 17.1R2Patch availableCNA
  • Junos OS VendorJuniper Affected 14.1 to before 14.1R10, 14.1R9; 14.1X53 to before 14.1X53-D47; 15.1 to before 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 to before 15.1X49-D100; 15.1X53 to before 15.1X53-D59; 16.1 to before 16.1R3-S8, 16.1R4-S8, 16.1R5; 16.2 to before 16.2R1-S6, 16.2R2; 17.1 to before 17.1R2 Fixed in 14.1R10, 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 Patch available CNA

CPE configurations NVD · 61

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:15.1x49:*:*:*:*:*:*:*15.1x49VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:*15.1x49 d10VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:*15.1x49 d20VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d30:*:*:*:*:*:*15.1x49 d30VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d35:*:*:*:*:*:*15.1x49 d35VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d40:*:*:*:*:*:*15.1x49 d40VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d45:*:*:*:*:*:*15.1x49 d45VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d50:*:*:*:*:*:*15.1x49 d50VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d55:*:*:*:*:*:*15.1x49 d55VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d60:*:*:*:*:*:*15.1x49 d60VulnerableJuniper
  • cpe:2.3:o:juniper:junos:15.1x49:*:*:*:*:*:*:* Versions 15.1x49 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:* Versions 15.1x49 d10 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:* Versions 15.1x49 d20 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d30:*:*:*:*:*:* Versions 15.1x49 d30 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d35:*:*:*:*:*:* Versions 15.1x49 d35 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d40:*:*:*:*:*:* Versions 15.1x49 d40 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d45:*:*:*:*:*:* Versions 15.1x49 d45 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d50:*:*:*:*:*:* Versions 15.1x49 d50 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d55:*:*:*:*:*:* Versions 15.1x49 d55 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d60:*:*:*:*:*:* Versions 15.1x49 d60 Vulnerable ·Juniper
Show 51 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:15.1x49:d65:*:*:*:*:*:*15.1x49 d65VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d70:*:*:*:*:*:*15.1x49 d70VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d75:*:*:*:*:*:*15.1x49 d75VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d80:*:*:*:*:*:*15.1x49 d80VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x49:d90:*:*:*:*:*:*15.1x49 d90VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:*:*:*:*:*:*:*14.1VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r1:*:*:*:*:*:*14.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r2:*:*:*:*:*:*14.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r3:*:*:*:*:*:*14.1 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r4:*:*:*:*:*:*14.1 r4VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r5:*:*:*:*:*:*14.1 r5VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r6:*:*:*:*:*:*14.1 r6VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r7:*:*:*:*:*:*14.1 r7VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1:r9:*:*:*:*:*:*14.1 r9VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:*:*:*:*:*:*:*14.1x53VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:*14.1x53 d10VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:*14.1x53 d15VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:*14.1x53 d16VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:*14.1x53 d25VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:*14.1x53 d26VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d27:*:*:*:*:*:*14.1x53 d27VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d30:*:*:*:*:*:*14.1x53 d30VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d35:*:*:*:*:*:*14.1x53 d35VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d40:*:*:*:*:*:*14.1x53 d40VulnerableJuniper
cpe:2.3:o:juniper:junos:14.1x53:d45:*:*:*:*:*:*14.1x53 d45VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:*:*:*:*:*:*:*15.1x53VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d10:*:*:*:*:*:*15.1x53 d10VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d20:*:*:*:*:*:*15.1x53 d20VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d21:*:*:*:*:*:*15.1x53 d21VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d30:*:*:*:*:*:*15.1x53 d30VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d32:*:*:*:*:*:*15.1x53 d32VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d33:*:*:*:*:*:*15.1x53 d33VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d34:*:*:*:*:*:*15.1x53 d34VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d50:*:*:*:*:*:*15.1x53 d50VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d51:*:*:*:*:*:*15.1x53 d51VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d52:*:*:*:*:*:*15.1x53 d52VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d55:*:*:*:*:*:*15.1x53 d55VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d57:*:*:*:*:*:*15.1x53 d57VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1x53:d58:*:*:*:*:*:*15.1x53 d58VulnerableJuniper
cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:*16.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:*16.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:*16.1 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:16.1:r4:*:*:*:*:*:*16.1 r4VulnerableJuniper
cpe:2.3:o:juniper:junos:16.2:r1:*:*:*:*:*:*16.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:17.1:r1:*:*:*:*:*:*17.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:*15.1VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*15.1 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:*15.1 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:r3:*:*:*:*:*:*15.1 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:r4:*:*:*:*:*:*15.1 r4VulnerableJuniper
cpe:2.3:o:juniper:junos:15.1:r6:*:*:*:*:*:*15.1 r6VulnerableJuniper
  • cpe:2.3:o:juniper:junos:15.1x49:d65:*:*:*:*:*:* Versions 15.1x49 d65 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d70:*:*:*:*:*:* Versions 15.1x49 d70 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d75:*:*:*:*:*:* Versions 15.1x49 d75 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d80:*:*:*:*:*:* Versions 15.1x49 d80 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x49:d90:*:*:*:*:*:* Versions 15.1x49 d90 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:*:*:*:*:*:*:* Versions 14.1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r1:*:*:*:*:*:* Versions 14.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r2:*:*:*:*:*:* Versions 14.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r3:*:*:*:*:*:* Versions 14.1 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r4:*:*:*:*:*:* Versions 14.1 r4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r5:*:*:*:*:*:* Versions 14.1 r5 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r6:*:*:*:*:*:* Versions 14.1 r6 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r7:*:*:*:*:*:* Versions 14.1 r7 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1:r9:*:*:*:*:*:* Versions 14.1 r9 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:*:*:*:*:*:*:* Versions 14.1x53 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:* Versions 14.1x53 d10 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:* Versions 14.1x53 d15 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:* Versions 14.1x53 d16 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:* Versions 14.1x53 d25 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:* Versions 14.1x53 d26 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d27:*:*:*:*:*:* Versions 14.1x53 d27 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d30:*:*:*:*:*:* Versions 14.1x53 d30 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d35:*:*:*:*:*:* Versions 14.1x53 d35 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d40:*:*:*:*:*:* Versions 14.1x53 d40 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:14.1x53:d45:*:*:*:*:*:* Versions 14.1x53 d45 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:*:*:*:*:*:*:* Versions 15.1x53 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d10:*:*:*:*:*:* Versions 15.1x53 d10 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d20:*:*:*:*:*:* Versions 15.1x53 d20 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d21:*:*:*:*:*:* Versions 15.1x53 d21 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d30:*:*:*:*:*:* Versions 15.1x53 d30 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d32:*:*:*:*:*:* Versions 15.1x53 d32 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d33:*:*:*:*:*:* Versions 15.1x53 d33 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d34:*:*:*:*:*:* Versions 15.1x53 d34 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d50:*:*:*:*:*:* Versions 15.1x53 d50 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d51:*:*:*:*:*:* Versions 15.1x53 d51 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d52:*:*:*:*:*:* Versions 15.1x53 d52 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d55:*:*:*:*:*:* Versions 15.1x53 d55 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d57:*:*:*:*:*:* Versions 15.1x53 d57 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1x53:d58:*:*:*:*:*:* Versions 15.1x53 d58 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:* Versions 16.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:* Versions 16.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:* Versions 16.1 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:16.1:r4:*:*:*:*:*:* Versions 16.1 r4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:16.2:r1:*:*:*:*:*:* Versions 16.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:17.1:r1:*:*:*:*:*:* Versions 17.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:* Versions 15.1 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:r2:*:*:*:*:*:* Versions 15.1 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:r3:*:*:*:*:*:* Versions 15.1 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:r4:*:*:*:*:*:* Versions 15.1 r4 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:15.1:r6:*:*:*:*:*:* Versions 15.1 r6 Vulnerable ·Juniper

Remediation

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 14.1R10, 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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0021
  2. 2026-10-03 Alias added: GHSA-cm2c-mr99-4v22

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
  • TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
  • TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
See all 792 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences