A session fixation vulnerability in J-Web on Junos OS may allow an attacker to use social engineering techniques to fix and hijack a J-Web administrators web session and potentially gain administrative access to the device. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15 on EX Series; 12.3X48 versions prior to 12.3X48-D85 on SRX Series; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1F6-S13, 15.1R7-S5; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238; 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R3-S1; 17.2 versions prior to 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S5; 17.4 versions prior to 17.4R2-S8, 17.4R3; 18.1 versions
The following software releases have been updated to resolve this specific issue: 12.3R12-S15*, 12.3X48-D85, 14.1X53-D51, 15.1F6-S13, 15.1R7-S5, 15.1X49-D180, 15.1X53-D238, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10, 17.1R3-S1, 17.2R2-S8, 17.2R3-S3, 17.3R3-S5, 17.4R2-S8, 17.4R3*, 18.1R3-S8*, 18.2R3, 18.3R3, 18.4R2, 19.1R1-S2, 19.1R2, 19.2R1, and all subsequent releases. *pending publication
Use access control lists or firewall filters to limit access to Junos J-Web interface to only trusted users and networks to reduce risks of exploitation of this vulnerability. Using common BCPs of safe web browsing such as not clicking on links in email or other media would reduce risks of exploitation of this vulnerability. Disabling J-Web would completely prevent any exploitation of this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=12.3<12.3R12-S15 | 12.3R12-S15 | advisory ↗ |
| Juniper Networks Junos OS | >=12.3X48<12.3X48-D85 | 12.3X48-D85 | 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-S5 | 15.1F6-S13, 15.1R7-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X49<15.1X49-D180 | 15.1X49-D180 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X53<15.1X53-D238 | 15.1X53-D238 | advisory ↗ |
| Juniper Networks Junos OS | >=16.1<16.1R4-S13, 16.1R7-S5 | 16.1R4-S13, 16.1R7-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=16.2<16.2R2-S10 | 16.2R2-S10 | advisory ↗ |
| Juniper Networks Junos OS | >=17.1<17.1R3-S1 | 17.1R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=17.2<17.2R2-S8, 17.2R3-S3 | 17.2R2-S8, 17.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R3-S5 | 17.3R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=17.4<17.4R2-S8, 17.4R3 | 17.4R2-S8, 17.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.1<18.1R3-S8 | 18.1R3-S8 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R3 | 18.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R3 | 18.3R3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R2 | 18.4R2 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R1-S2, 19.1R2 | 19.1R1-S2, 19.1R2 | advisory ↗ |