High severity · published Apr 1, 2022
CVE-2021-28504
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…
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
Eos · Arista
4.26 before 4.26.4m; 4.27 before 4.27.1f · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28504
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28504
Mitigation
https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073
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