PT-2021-2134 · Juniper Networks · Junos

Published 2021-01-13 · Updated 2021-01-21 · CVE-2021-0203

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 15.1R7-S7 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 16.1R7-S8 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 17.2R3-S4 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 17.3R3-S8 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 17.4R2-S11 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 17.4R3-S2 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.1R3-S10 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.2R3-S5 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.3R2-S4 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.3R3-S2 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.4R2-S5 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 18.4R3-S3 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.1R2-S2 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.1R3-S2 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.2R1-S5 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.2R2-S1 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.2R3 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.3R2-S4 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.3R3 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.4R1-S3 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.4R2-S1 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 19.4R3 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 20.1R1-S2 Juniper Networks Junos OS on EX Series and QFX5K Series versions prior to 20.1R2

Description The issue is related to the Storm Control profile on Juniper Networks EX and QFX5K Series platforms configured with Redundant Trunk Group (RTG). The Storm Control profile might not take effect when it reaches the threshold condition, allowing broadcast, multicast, and unknown unicast packets to proliferate and degrade the LAN. This is due to insufficient input validation. A remote attacker could exploit this issue to cause a denial of service.

Recommendations For versions prior to 15.1R7-S7, update to 15.1R7-S7 or later. For versions prior to 16.1R7-S8, update to 16.1R7-S8 or later. For versions prior to 17.2R3-S4, update to 17.2R3-S4 or later. For versions prior to 17.3R3-S8, update to 17.3R3-S8 or later. For versions prior to 17.4R2-S11, update to 17.4R2-S11 or later. For versions prior to 17.4R3-S2, update to 17.4R3-S2 or later. For versions prior to 18.1R3-S10, update to 18.1R3-S10 or later. For versions prior to 18.2R3-S5, update to 18.2R3-S5 or later. For versions prior to 18.3R2-S4, update to 18.3R2-S4 or later. For versions prior to 18.3R3-S2, update to 18.3R3-S2 or later. For versions prior to 18.4R2-S5, update to 18.4R2-S5 or later. For versions prior to 18.4R3-S3, update to 18.4R3-S3 or later. For versions prior to 19.1R2-S2, update to 19.1R2-S2 or later. For versions prior to 19.1R3-S2, update to 19.1R3-S2 or later. For versions prior to 19.2R1-S5, update to 19.2R1-S5 or later. For versions prior to 19.2R2-S1, update to 19.2R2-S1 or later. For versions prior to 19.2R3, update to 19.2R3 or later. For versions prior to 19.3R2-S4, update to 19.3R2-S4 or later. For versions prior to 19.3R3, update to 19.3R3 or later. For versions prior to 19.4R1-S3, update to 19.4R1-S3 or later. For versions prior to 19.4R2-S1, update to 19.4R2-S1 or later. For versions prior to 19.4R3, update to 19.4R3 or later. For versions prior to 20.1R1-S2, update to 20.1R1-S2 or later. For versions prior to 20.1R2, update to 20.1R2 or later.

Fix

Weakness Enumeration

CWE-794

Related Identifiers

BDU:2021-00993

CVE-2021-0203

Affected Products

Junos

References · 7

• https://kb.juniper.net/JSA11093 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-0203 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00993 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-0203 · Security Note
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11093&cat=SIRT_1&actp=LIST · Note
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11093&cat=SIRT_1&actp=LIST · Note
• https://t.me/cvenotify/8835 · Telegram Post