A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS). The process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service. An indication that the system experienced this issue is the following log message: <date> <hostname> evo-aftmand-bt[<pid>]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes This issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201
The following software releases have been updated to resolve this specific issue: Junos OS Evolved 21.4R3-S3-EVO, 22.2R3-S2-EVO*, 22.3R3-EVO, 22.4R1-S2-EVO, 22.4R2-EVO, 23.1R1-EVO, and all subsequent releases.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS Evolved | >=21.2<21.2* | 21.2* | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=21.3<21.3* | 21.3* | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=21.4<21.4R3-S3-EVO | 21.4R3-S3-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=22.1<22.1* | 22.1* | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=22.2<22.2R3-S2-EVO | 22.2R3-S2-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=22.3<22.3R3-EVO | 22.3R3-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=22.4<22.4R1-S2-EVO, 22.4R2-EVO | 22.4R1-S2-EVO, 22.4R2-EVO | advisory ↗ |