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 pr
The following software releases have been updated to resolve this specific issue: 14.1X53-D53, 15.1X53-D593, 15.1R7-S4, 16.1R7-S4, 17.1R2-S11, 17.1R3-S1, 17.2R3-S3, 17.3R2-S5, 17.3R3-S6, 17.4R2-S9, 17.4R3, 18.1R3-S8, 18.2R2, 18.3R1-S7, 18.3R2, 18.4R1, and all subsequent releases.
Limit physical access to the console port only to trusted administrators.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=14.1X53<14.1X53-D53 | 14.1X53-D53 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1<15.1R7-S4 | 15.1R7-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X53<15.1X53-D593 | 15.1X53-D593 | advisory ↗ |
| Juniper Networks Junos OS | >=16.1<16.1R7-S4 | 16.1R7-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=17.1<17.1R2-S11, 17.1R3-S1 | 17.1R2-S11, 17.1R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=17.2<17.2R3-S3 | 17.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R2-S5, 17.3R3-S6 | 17.3R2-S5, 17.3R3-S6 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R2-S9, 17.4R3 | 17.4R2-S9, 17.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S8 | 18.1R3-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R2 | 18.2R2 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R1-S7, 18.3R2 | 18.3R1-S7, 18.3R2 | advisory ↗ |