CVE-2020-1687 Information

Description

On Juniper Networks EX4300-MP Series EX4600 Series and QFX5K Series deployed in (Ethernet VPN) EVPN-(Virtual Extensible LAN) VXLAN configuration receipt of a stream of specific VXLAN encapsulated layer 2 frames can cause high CPU load which could lead to network protocol operation issue and traffic interruption. This issue affects devices that are configured as a Layer 2 or Layer 3 gateway of an EVPN-VXLAN deployment. The offending layer 2 frames that cause the issue originate from a different access switch that get encapsulated within the same EVPN-VXLAN domain. This issue affects Juniper Networks Junos OS on EX4300-MP Series EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11 17.4R3-S2 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4 18.3R3-S3; 18.4 versions prior to 18.4R2-S5 18.4R3-S4; 19.1 versions prior to 19.1R2-S2 19.1R3-S2; 19.2 versions prior to 19.2R1-S5 19.2R2-S1 19.2R3; 19.3 versions prior to 19.3R2-S4 19.3R3; 19.4 versions prior to 19.4R1-S3 19.4R2-S1 19.4R3; 20.1 versions prior to 20.1R1-S3 20.1R2.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://kb.juniper.net/JSA11084

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5