A Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization) vulnerability in the firewall process (dfwd) of Juniper Networks Junos OS allows an attacker to bypass the firewall rule sets applied to the input loopback filter on any interfaces of a device. This issue is detectable by reviewing the PFE firewall rules, as well as the firewall counters and seeing if they are incrementing or not. For example: show firewall Filter: __default_bpdu_filter__ Filter: FILTER-INET-01 Counters: Name Bytes Packets output-match-inet 0 0 <<<<<< missing firewall packet count This issue affects: Juniper Networks Junos OS 14.1X53 versions prior to 14.1X53-D53 on QFX Series; 14.1 versions 14.1R1 and later versions prior to 15.1 versions prior to 15.1R7-S6 on QFX Series, PTX Serie
The following software releases have been updated to resolve this specific issue: Junos OS 14.1X53-D53, 15.1R7-S6, 15.1X53-D593, 16.1R7-S7, 16.2R2-S11, 16.2R3, 17.1R2-S11, 17.1R3-S2, 17.2R1-S9, 17.2R3-S3, 17.3R2-S5, 17.3R3-S7, 17.4R2-S9, 17.4R3, 18.1R3-S9, 18.2R2-S6, 18.2R3-S3, 18.3R1-S7, 18.3R2-S3, 18.3R3-S1, 18.4R1-S5, 18.4R2-S3, 18.4R3, 19.1R1-S4, 19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R1, and all subsequent releases.
There are no viable workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=14.1R1<14.1* | 14.1* | advisory ↗ |
| Juniper Networks Junos OS | >=14.1X53<14.1X53-D53 | 14.1X53-D53 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1<15.1R7-S6 | 15.1R7-S6 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1X53<15.1X53-D593 | 15.1X53-D593 | advisory ↗ |
| Juniper Networks Junos OS | >=16.1<16.1R7-S7 | 16.1R7-S7 | advisory ↗ |
| Juniper Networks Junos OS | >=16.2<16.2R2-S11, 16.2R3 | 16.2R2-S11, 16.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=17.1<17.1R2-S11, 17.1R3-S2 | 17.1R2-S11, 17.1R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=17.2<17.2R1-S9, 17.2R3-S3 | 17.2R1-S9, 17.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R2-S5, 17.3R3-S7 | 17.3R2-S5, 17.3R3-S7 | 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-S9 | 18.1R3-S9 | advisory ↗ |
| Juniper Networks Junos OS | >=18.2<18.2R2-S6, 18.2R3-S3 | 18.2R2-S6, 18.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=18.3<18.3R1-S7, 18.3R2-S3, 18.3R3-S1 | 18.3R1-S7, 18.3R2-S3, 18.3R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R1-S5, 18.4R2-S3, 18.4R3 | 18.4R1-S5, 18.4R2-S3, 18.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R1-S4, 19.1R2-S1, 19.1R3 | 19.1R1-S4, 19.1R2-S1, 19.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R1-S3, 19.2R2 | 19.2R1-S3, 19.2R2 | advisory ↗ |