On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic Routing Encapsulation) tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. This occurs because the switch does not verify the tunnel protocol type, potentially leading to the unexpected processing of non-configured tunnel traffic. This issue has been reported as being exploited in the wild.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | ||
<= 4.30CPE match | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | ||
>= 4.31.0, <= 4.31CPE match | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | ||
>= 4.32.0, <= 4.32CPE match | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* | ||
>= 4.33.0, <= 4.33CPE match | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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