On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-15180 On Arista Strata family products which have “TCAM profile” feature enabled when Port IPv4 access-list has a rule which matches on “vxlan” as protocol then that rule and subsequent rules ( rules declared after it in ACL ) do not match on IP protocol field as expected.
Fixes

Solution

The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Artista recommends customers move to the latest version of each release that contains all the fixes listed below. CVE-2021-28504 has been fixed in the following releases: 4.26.4F and later releases in the 4.26.x train 4.27.1M and later releases in the 4.27.x train


Workaround

Replace "vxlan" IP protocol match with match on IP protocol "udp" and Layer 4 destination port for VxLAN encapsulated packets i.e 4789. If VXLAN L4 destination port number is not the default 4789 then use the configured L4 destination port number.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: Arista

Published:

Updated: 2024-08-03T21:47:32.630Z

Reserved: 2021-03-16T00:00:00

Link: CVE-2021-28504

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-04-01T23:15:09.380

Modified: 2024-11-21T05:59:47.823

Link: CVE-2021-28504

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.