CVE-2020-1668 Information

Description

On Juniper Networks EX2300 Series receipt of a stream of specific multicast packets by the layer2 interface can cause high CPU load which could lead to traffic interruption. This issue occurs when multicast packets are received by the layer 2 interface. To check if the device has high CPU load due to this issue the administrator can issue the following command: user@host show chassis routing-engine Routing Engine status: … Idle 2 percent the \Idle\ value shows as low (2 in the example above) and also the following command: user@host show system processes summary … PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND 11639 root 52 0 283M 11296K select 12:15 44.97 eventd 11803 root 81 0 719M 239M RUN 251:12 31.98 fxpcfxpc the eventd and the fxpc processes might use higher WCPU percentage (respectively 44.97 and 31.98 in the above example). This issue affects Juniper Networks Junos OS on EX2300 Series: 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 19.1R3-S2; 19.2 versions prior to 19.2R1-S5 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-S2 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/JSA11065

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