A persistent Cross-Site Scripting (XSS) vulnerability in Junos OS J-Web interface may allow remote unauthenticated attackers to perform administrative actions on the Junos device. Successful exploitation requires a Junos administrator to first perform certain diagnostic actions on J-Web. This issue affects: Juniper Networks Junos OS 12.1X46 versions prior to 12.1X46-D86; 12.3 versions prior to 12.3R12-S13; 12.3X48 versions prior to 12.3X48-D80; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180; 15.1X53 versions prior to 15.1X53-D497, 15.1X53-D69; 16.1 versions prior to 16.1R7-S5; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1; 17.3
The following software releases have been updated to resolve this specific issue: 12.1X46-D86, 12.3R12-S13, 12.3X48-D80, 14.1X53-D51, 15.1F6-S13, 15.1R7-S4, 15.1X49-D171, 15.1X49-D180, 15.1X53-D497, 15.1X53-D69, 16.1R7-S5, 16.2R2-S9, 17.1R3, 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, 17.3R3-S6, 17.4R1-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R1-S5, 18.2R2-S3, 18.2R3, 18.3R1-S3, 18.3R2, 18.4R1-S2, 18.4R2, 19.1R1, and all subsequent releases.
Disable J-Web. Limit access to the Junos device to only trusted hosts and networks.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=12.1X46<12.1X46-D86 | 12.1X46-D86 | advisory ↗ |
| Juniper Networks Junos OS | >=12.3<12.3R12-S13 | 12.3R12-S13 | advisory ↗ |
| Juniper Networks Junos OS | >=12.3X48<12.3X48-D80 | 12.3X48-D80 | advisory ↗ |
| Juniper Networks Junos OS | >=14.1X53<14.1X53-D51 | 14.1X53-D51 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1<15.1F6-S13, 15.1R7-S4 | 15.1F6-S13, 15.1R7-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X49<15.1X49-D171, 15.1X49-D180 | 15.1X49-D171, 15.1X49-D180 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X53<15.1X53-D497, 15.1X53-D69 | 15.1X53-D497, 15.1X53-D69 | advisory ↗ |
| Juniper Networks Junos OS | >=16.1<16.1R7-S5 | 16.1R7-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=16.2<16.2R2-S9 | 16.2R2-S9 | advisory ↗ |
| Juniper Networks Junos OS | >=17.1<17.1R3 | 17.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=17.2<17.2R1-S8, 17.2R2-S7, 17.2R3-S1 | 17.2R1-S8, 17.2R2-S7, 17.2R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R3-S6 | 17.3R3-S6 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R1-S7, 17.4R2-S4, 17.4R3 | 17.4R1-S7, 17.4R2-S4, 17.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S5 | 18.1R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R1-S5, 18.2R2-S3, 18.2R3 | 18.2R1-S5, 18.2R2-S3, 18.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R1-S3, 18.3R2, 18.3R3 | 18.3R1-S3, 18.3R2, 18.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R1-S2, 18.4R2 | 18.4R1-S2, 18.4R2 | advisory ↗ |