High severity · published Apr 14, 2022
CVE-2021-28505
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL…
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.
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)0.9% · higher than 59% 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-2021-28505
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28505
Exploit
https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073
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