Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-26569

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/12/2020
Last modified:
27/01/2021

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.90
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.21.0f (including) 4.21.12m (including)
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.22.0f (including) 4.22.7m (including)
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.23.0f (including) 4.23.5m (including)
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.24.0f (including) 4.24.2f (including)
cpe:2.3:h:arista:7010t-48:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050qx-32s:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050qx2-32s:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx-128:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx-64:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx-72q:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx2-128:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx2-72q:-:*:*:*:*:*:*:*
cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools