On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an established IPv6 BGP session to terminate, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue does not affect IPv4 BGP sessions. This issue affects IBGP or EBGP peer sessions with IPv6. This issue affects: Juniper Networks Junos OS Evolved: 19.4 versions prior to 19.4R2-S3-EVO; 20.1 versions prior to 20.1R2-S3-EVO; 20.2 versions prior to 20.2R2-S1-EVO; 20.3 versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS releases.
The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 19.4R2-S3-EVO, 20.1R2-S3-EVO, 20.2R2-S1-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.
There are no viable workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS Evolved | >=19.4-EVO<19.4R2-S3-EVO | 19.4R2-S3-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=20.1-EVO<20.1R2-S3-EVO | 20.1R2-S3-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=20.2-EVO<20.2R2-S1-EVO | 20.2R2-S1-EVO | advisory ↗ |
| Juniper Networks Junos OS Evolved | >=20.3-EVO<20.3R2-EVO | 20.3R2-EVO | advisory ↗ |