PT-2021-3309 · Juniper Networks · Junos

Published 2021-04-14 · Updated 2021-07-23 · CVE-2021-0228

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS on MX Series versions prior to 15.1R7-S9 Juniper Networks Junos OS on MX Series versions prior to 17.3R3-S11 Juniper Networks Junos OS on MX Series versions prior to 17.4R3-S4 Juniper Networks Junos OS on MX Series versions prior to 18.1R3-S12 Juniper Networks Junos OS on MX Series versions prior to 18.2R2-S8 Juniper Networks Junos OS on MX Series versions prior to 18.2R3-S8 Juniper Networks Junos OS on MX Series versions prior to 18.3R3-S4 Juniper Networks Junos OS on MX Series versions prior to 18.4R1-S8 Juniper Networks Junos OS on MX Series versions prior to 18.4R2-S7 Juniper Networks Junos OS on MX Series versions prior to 18.4R3-S7 Juniper Networks Junos OS on MX Series versions prior to 19.1R3-S4 Juniper Networks Junos OS on MX Series versions prior to 19.2R1-S6 Juniper Networks Junos OS on MX Series versions prior to 19.3R3-S2 Juniper Networks Junos OS on MX Series versions prior to 19.4R2-S4 Juniper Networks Junos OS on MX Series versions prior to 19.4R3-S2 Juniper Networks Junos OS on MX Series versions prior to 20.1R2 Juniper Networks Junos OS on MX Series versions prior to 20.1R3 Juniper Networks Junos OS on MX Series versions prior to 20.2R2-S1 Juniper Networks Junos OS on MX Series versions prior to 20.2R3 Juniper Networks Junos OS on MX Series versions prior to 20.3R1-S1 Juniper Networks Junos OS on MX Series versions prior to 20.3R2

Description The issue is related to an improper check for unusual or exceptional conditions in the implementation of the VXLAN technology in Juniper Networks MX Series platforms with Trio-based MPC, which may allow an attacker to cause a Distributed Denial of Service (DDoS) protection to trigger unexpectedly by sending specific Layer 2 traffic. This can result in traffic impact, and continued receipt and processing of these specific Layer 2 frames will sustain the Denial of Service (DoS) condition. An indication of compromise can be checked by examining DDOS LACP violations.

Recommendations For Juniper Networks Junos OS on MX Series versions prior to 15.1R7-S9, update to version 15.1R7-S9 or later. For Juniper Networks Junos OS on MX Series versions prior to 17.3R3-S11, update to version 17.3R3-S11 or later. For Juniper Networks Junos OS on MX Series versions prior to 17.4R3-S4, update to version 17.4R3-S4 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.1R3-S12, update to version 18.1R3-S12 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.2R2-S8, update to version 18.2R2-S8 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.2R3-S8, update to version 18.2R3-S8 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.3R3-S4, update to version 18.3R3-S4 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.4R1-S8, update to version 18.4R1-S8 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.4R2-S7, update to version 18.4R2-S7 or later. For Juniper Networks Junos OS on MX Series versions prior to 18.4R3-S7, update to version 18.4R3-S7 or later. For Juniper Networks Junos OS on MX Series versions prior to 19.1R3-S4, update to version 19.1R3-S4 or later. For Juniper Networks Junos OS on MX Series versions prior to 19.2R1-S6, update to version 19.2R1-S6 or later. For Juniper Networks Junos OS on MX Series versions prior to 19.3R3-S2, update to version 19.3R3-S2 or later. For Juniper Networks Junos OS on MX Series versions prior to 19.4R2-S4, update to version 19.4R2-S4 or later. For Juniper Networks Junos OS on MX Series versions prior to 19.4R3-S2, update to version 19.4R3-S2 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.1R2, update to version 20.1R2 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.1R3, update to version 20.1R3 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.2R2-S1, update to version 20.2R2-S1 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.2R3, update to version 20.2R3 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.3R1-S1, update to version 20.3R1-S1 or later. For Juniper Networks Junos OS on MX Series versions prior to 20.3R2, update to version 20.3R2 or later.

Fix

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

BDU:2021-03086

CVE-2021-0228

Affected Products

Junos

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-0228 · Security Note
• https://kb.juniper.net/JSA11123 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-0228 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03086 · Security Note
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11123 · Note
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11123 · Note