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.

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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

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Projects

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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.

Weaknesses