Description
On affected platforms running Arista EOS with one of the following features configured to redirect IP traffic to a next hop: policy-based routing (PBR), BGP Flowspec, or interface traffic policy -- certain IP traffic such as IPv4 packets with IP options may bypass the feature's set nexthop action and be slow-path forwarded (FIB routed) by the kernel as the packets are trapped to the CPU instead of following the redirect action's destination.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
Low
Affected products
- Arista Networks / EOS - BGP Flowspec4.32.0F – 4.32.1F
- Arista Networks / EOS - BGP Flowspec4.21.3F – 4.21.15M
- Arista Networks / EOS - BGP Flowspec4.22.0M – 4.22.13M
- Arista Networks / EOS - BGP Flowspec4.23.0M – 4.23.15M
- Arista Networks / EOS - BGP Flowspec4.24.0M – 4.24.11M
- Arista Networks / EOS - BGP Flowspec4.25.0M – 4.25.11M
- Arista Networks / EOS - BGP Flowspec4.26.0M – 4.26.14M
- Arista Networks / EOS - BGP Flowspec4.27.0M – 4.27.12M
- Arista Networks / EOS - BGP Flowspec4.28.0M – 4.28.11M
- Arista Networks / EOS - BGP Flowspec4.29.0M – 4.29.9M
- Arista Networks / EOS - BGP Flowspec4.30.0M – 4.30.7M
- Arista Networks / EOS - BGP Flowspec4.31.0M – 4.31.4M
- Arista Networks / EOS - Interface Traffic Policy4.27.2F – 4.27.12F
- Arista Networks / EOS - Interface Traffic Policy4.32.0F – 4.32.1F
- Arista Networks / EOS - Interface Traffic Policy4.31.0M – 4.31.4M
- Arista Networks / EOS - Interface Traffic Policy4.30.0M – 4.30.7M
- Arista Networks / EOS - Interface Traffic Policy4.29.0M – 4.29.9M
- Arista Networks / EOS - Interface Traffic Policy4.28.0M – 4.28.11M
- Arista Networks / EOS-Policy Based Routing (PBR)4.26.0M – 4.26.14M
- Arista Networks / EOS-Policy Based Routing (PBR)4.27.0M – 4.27.12M
- Arista Networks / EOS-Policy Based Routing (PBR)4.28.0M – 4.28.11M
- Arista Networks / EOS-Policy Based Routing (PBR)4.29.0M – 4.29.9M
- Arista Networks / EOS-Policy Based Routing (PBR)4.30.0M – 4.30.7M
- Arista Networks / EOS-Policy Based Routing (PBR)4.31.0M – 4.31.4M
- Arista Networks / EOS-Policy Based Routing (PBR)4.32.0F – 4.32.1F
- Arista Networks / EOS-Policy Based Routing (PBR)4.21.0M – 4.21.15M
- Arista Networks / EOS-Policy Based Routing (PBR)4.22.0M – 4.22.13M
- Arista Networks / EOS-Policy Based Routing (PBR)4.23.0M – 4.23.15M
- Arista Networks / EOS-Policy Based Routing (PBR)4.24.0M – 4.24.11M
- Arista Networks / EOS-Policy Based Routing (PBR)4.25.0M – 4.25.11M