PT-2021-3664 · Juniper Networks · Junos

Published 2021-07-14 · Updated 2021-07-29 · CVE-2021-0288

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 versions prior to 17.3R3-S12 Juniper Networks Junos OS versions prior to 17.4R2-S13, 17.4R3-S5 Juniper Networks Junos OS versions prior to 18.1R3-S13 Juniper Networks Junos OS versions prior to 18.2R3-S8 Juniper Networks Junos OS versions prior to 18.3R3-S5 Juniper Networks Junos OS versions prior to 18.4R2-S8, 18.4R3-S8 Juniper Networks Junos OS versions prior to 19.1R3-S5 Juniper Networks Junos OS versions prior to 19.2R3-S2 Juniper Networks Junos OS versions prior to 19.3R2-S6, 19.3R3-S3 Juniper Networks Junos OS versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2 Juniper Networks Junos OS versions prior to 20.1R3 Juniper Networks Junos OS versions prior to 20.2R2-S2, 20.2R3 Juniper Networks Junos OS versions prior to 20.3R2 Juniper Networks Junos OS versions prior to 20.4R2

Description A vulnerability in the processing of specific MPLS packets in Juniper Networks Junos OS on MX Series and EX9200 Series devices with Trio-based MPCs may cause FPC to crash and lead to a Denial of Service (DoS) condition. Continued receipt of this packet will sustain the Denial of Service (DoS) condition. This issue only affects MX Series and EX9200 Series with Trio-based PFEs.

Recommendations For versions prior to 17.3R3-S12, update to 17.3R3-S12 or later. For versions prior to 17.4R2-S13, 17.4R3-S5, update to 17.4R2-S13, 17.4R3-S5 or later. For versions prior to 18.1R3-S13, update to 18.1R3-S13 or later. For versions prior to 18.2R3-S8, update to 18.2R3-S8 or later. For versions prior to 18.3R3-S5, update to 18.3R3-S5 or later. For versions prior to 18.4R2-S8, 18.4R3-S8, update to 18.4R2-S8, 18.4R3-S8 or later. For versions prior to 19.1R3-S5, update to 19.1R3-S5 or later. For versions prior to 19.2R3-S2, update to 19.2R3-S2 or later. For versions prior to 19.3R2-S6, 19.3R3-S3, update to 19.3R2-S6, 19.3R3-S3 or later. For versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2, update to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2 or later. For versions prior to 20.1R3, update to 20.1R3 or later. For versions prior to 20.2R2-S2, 20.2R3, update to 20.2R2-S2, 20.2R3 or later. For versions prior to 20.3R2, update to 20.3R2 or later. For versions prior to 20.4R2, update to 20.4R2 or later.

Fix

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

BDU:2021-03897

CVE-2021-0288

Affected Products

Junos

References · 4

• https://kb.juniper.net/JSA11190 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0288 · Security Note
• https://bdu.fstec.ru/vul/2021-03897 · Security Note
• https://osv.dev/vulnerability/CVE-2021-0288 · Vendor Advisory