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

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CVE-2019-18948

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
16/04/2020
Last modified:
21/07/2021

Description

An issue was found in Arista EOS. Specific malformed ARP packets can impact the software forwarding of VxLAN packets. This issue is found in Arista’s EOS VxLAN code, which can allow attackers to crash the VxlanSwFwd agent. This affects EOS 4.21.8M and below releases in the 4.21.x train, 4.22.3M and below releases in the 4.22.x train, 4.23.1F and below releases in the 4.23.x train, and all releases in 4.15, 4.16, 4.17, 4.18, 4.19, 4.20 code train.

Impact

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

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

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

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.21.0 (including) 4.21.8m (including)
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.22.0 (including) 4.22.3m (including)
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* 4.23.0 (including) 4.23.1f (including)
cpe:2.3:o:arista:eos:4.15:*:*:*:*:*:*:*
cpe:2.3:o:arista:eos:4.16:*:*:*:*:*:*:*
cpe:2.3:o:arista:eos:4.17:*:*:*:*:*:*:*
cpe:2.3:o:arista:eos:4.18:*:*:*:*:*:*:*
cpe:2.3:o:arista:eos:4.19:*:*:*:*:*:*:*
cpe:2.3:o:arista:eos:4.20:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools