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Medium severity6.5NVD Advisory· Published Oct 16, 2020· Updated Jun 17, 2026

CVE-2020-1689

CVE-2020-1689

Description

On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.

Affected products

135
  • Juniper Networks/Junos132 versions
    cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:*+ 131 more
    • cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s7:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3-s8:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.3:r3:-:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s10:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s8:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2-s9:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r2-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s10:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s8:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3-s9:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r1-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r1-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r1-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r1:-:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r3-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r3-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.1:r3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:*
    • cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
    • (no CPE)range: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2
    • (no CPE)range: 17.3
  • Juniper Networks/EX4300-MP Seriesllm-fuzzy
    Range: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2
  • Juniper Networks/QFX5k Seriesllm-fuzzy
    Range: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2
  • Juniper Networks/EX4600 Seriesllm-fuzzy
    Range: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2

Patches

Vulnerability mechanics

References

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