Medium severity · published Dec 28, 2020
CVE-2020-26569
In EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindings and as a result packets can be incorrectly forwarded across VLAN boundaries
5.9
CVSS
0.9%
EPSS
No
On KEV
Description
In EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindings and as a result packets can be incorrectly forwarded across VLAN boundaries. This can result in traffic being discarded on the receiving VLAN. This affects versions: 4.21.12M and below releases in the 4.21.x train; 4.22.7M and below releases in the 4.22.x train; 4.23.5M and below releases in the 4.23.x train; 4.24.2F and below releases in the 4.24.x train.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
Eos · Arista
4.21.0f through 4.21.12m; 4.22.0f through 4.22.7m; 4.23.0f through 4.23.5m; 4.24.0f through 4.24.2f · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26569
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-26569
Exploit
https://www.arista.com/en/support/advisories-notices/security-advisories/11997-security-advisory-57
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