CVE-2020-1618

Junos OS: EX and QFX Series: Console port authentication bypass vulnerability

MEDIUM

6.8

CVSS Score

Published: April 8, 2020 at 07:25 PM UTC

Updated: June 17, 2026 at 03:01 AM UTC

16 products affected across 2 vendorsJunosQfx5200Qfx5110

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Severity

MEDIUM6.8

Exploit prediction

EPSS 0.4%

Description

On Juniper Networks EX and QFX Series, an authentication bypass vulnerability may allow a user connected to the console port to login as root without any password. This issue might only occur in certain scenarios: • At the first reboot after performing device factory reset using the command “request system zeroize”; or • A temporary moment during the first reboot after the software upgrade when the device configured in Virtual Chassis mode. This issue affects Juniper Networks Junos OS on EX and QFX Series: 14.1X53 versions prior to 14.1X53-D53; 15.1 versions prior to 15.1R7-S4; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S4; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R3-S3; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R2; 18.3 versions prior to 18.3R1-S7, 18.3R2. This issue does not affect Juniper Networks Junos OS 12.3.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

14.1X53 ≤ v < 14.1X53-D5315.1 ≤ v < 15.1R7-S415.1X53 ≤ v < 15.1X53-D59316.1 ≤ v < 16.1R7-S417.1 ≤ v < 17.1R2-S11, 17.1R3-S117.2 ≤ v < 17.2R3-S317.3 ≤ v < 17.3R2-S5, 17.3R3-S617.4 ≤ v < 17.4R2-S9, 17.4R318.1 ≤ v < 18.1R3-S818.2 ≤ v < 18.2R218.3 ≤ v < 18.3R1-S7, 18.3R214.1X5314.1x5314.1x53 d10 14.1x53 d15 14.1x53 d16 14.1x53 d25 14.1x53 d26 14.1x53 d27 14.1x53 d30 14.1x53 d35 14.1x53 d40 14.1x53 d42 14.1x53 d43 14.1x53 d44 14.1x53 d45 14.1x53 d48 14.1x53 d50 14.1x53 d51 14.1x53 d52 15.1 15.1 a1 15.1 f 15.1 f1 15.1 f2 15.1 f2-s1 15.1 f2-s2 15.1 f2-s3 15.1 f2-s4 15.1 f3 15.1 f4 15.1 f5 15.1 f5-s7 15.1 f6 15.1 f6-s1 15.1 f6-s12 15.1 f6-s2 15.1 f6-s3 15.1 f6-s4 15.1 f6-s7 15.1 f7 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r4-s7 15.1 r4-s8 15.1 r4-s9 15.1 r5 15.1 r5-s1 15.1 r5-s5 15.1 r5-s6 15.1 r6 15.1 r6-s1 15.1 r6-s2 15.1 r6-s6 15.1 r7 15.1 r7-s1 15.1 r7-s2 15.1 r7-s3 15.1X5315.1x5315.1x53 d10 15.1x53 d20 15.1x53 d21 15.1x53 d210 15.1x53 d230 15.1x53 d231 15.1x53 d23215.1x53 d23315.1x53 d234 15.1x53 d235 15.1x53 d236 15.1x53 d237 15.1x53 d25 15.1x53 d30 15.1x53 d31 15.1x53 d32 15.1x53 d33 15.1x53 d34 15.1x53 d40 15.1x53 d45 15.1x53 d47 15.1x53 d470 15.1x53 d48 15.1x53 d495 15.1x53 d50 15.1x53 d51 15.1x53 d52 15.1x53 d55 15.1x53 d56 15.1x53 d57 15.1x53 d5815.1x53 d5915.1x53 d590 15.1x53 d591 15.1x53 d592 15.1x53 d60 15.1x53 d61 15.1x53 d62 15.1x53 d63 15.1x53 d64 15.1x53 d65 15.1x53 d6615.1x53 d6715.1x53 d68 15.1x53 d69 15.1x53 d70 16.1 16.1 r1 16.1 r2 16.1 r3 16.1 r3-s10 16.1 r3-s11 16.1 r4 16.1 r4-s12 16.1 r4-s2 16.1 r4-s3 16.1 r4-s4 16.1 r4-s6 16.1 r5 16.1 r5-s4 16.1 r6-s1 16.1 r6-s6 16.1 r7 16.1 r7-s2 16.1 r7-s3 17.1 17.1 r1 17.1 r2 17.1 r2-s1 17.1 r2-s10 17.1 r2-s2 17.1 r2-s3 17.1 r2-s4 17.1 r2-s5 17.1 r2-s6 17.1 r2-s7 17.1 r2-s8 17.1 r2-s9 17.1 r3 17.2 17.2 r1 17.2 r1-s1 17.2 r1-s2 17.2 r1-s3 17.2 r1-s4 17.2 r1-s5 17.2 r1-s7 17.2 r1-s8 17.2 r2 17.2 r2-s6 17.2 r2-s7 17.2 r3-s1 17.2 r3-s2 17.3 17.3 r1-s1 17.3 r2 17.3 r2-s1 17.3 r2-s2 17.3 r2-s3 17.3 r2-s4 17.3 r3 17.3 r3-s1 17.3 r3-s2 17.3 r3-s3 17.3 r3-s4 17.3 r3-s5 17.4 17.4 r1 17.4 r1-s1 17.4 r1-s2 17.4 r1-s4 17.4 r1-s5 17.4 r1-s6 17.4 r1-s7 17.4 r2 17.4 r2-s1 17.4 r2-s2 17.4 r2-s3 17.4 r2-s4 17.4 r2-s5 17.4 r2-s6 17.4 r2-s7 17.4 r2-s8 18.1 18.1 r2 18.1 r2-s1 18.1 r2-s2 18.1 r2-s4 18.1 r3 18.1 r3-s1 18.1 r3-s2 18.1 r3-s3 18.1 r3-s4 18.1 r3-s6 18.1 r3-s7 18.2 18.3 18.3 r1 18.3 r1-s1 18.3 r1-s2 18.3 r1-s3 18.3 r1-s4 18.3 r1-s5 18.3 r1-s6

Vendor states this is fixed in 12.3 (unaffected)

Affected range stops below 14.1X53-D53, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1R7-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X53-D593, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R7-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R2-S11, 17.1R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.3R2-S5, 17.3R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R2-S9, 17.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3R1-S7, 18.3R2, so it looks safe — our inference, not a vendor statement

juniper-ex2300 (environment) · juniper-ex2300-c (environment) · juniper-ex3400 (environment) · juniper-ex4300 (environment) · juniper-ex4600 (environment) · juniper-ex4650 (environment) · juniper-qfx10002 (environment) · juniper-qfx10008 (environment) · juniper-qfx10016 (environment) · juniper-qfx5100 (environment) · juniper-qfx5110 (environment) · juniper-qfx5120 (environment) · juniper-qfx5200 (environment) · juniper-qfx5210 (environment) · juniper-qfx5220 (environment)

Ex2300 · Juniperdevice

80%

All versions

Ex2300-C · Juniperdevice

80%

All versions

Ex3400 · Juniperdevice

80%

All versions

Ex4300 · Juniperdevice

80%

All versions