PT-2021-3645 · Juniper Networks · Junos Evolved+1

Published 2021-07-14 · Updated 2021-07-28 · CVE-2021-0281

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/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 17.4R3-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-S2 Juniper Networks Junos OS versions prior to 19.4R2-S4, 19.4R3-S3 Juniper Networks Junos OS versions prior to 20.1R3 Juniper Networks Junos OS versions prior to 20.2R3 Juniper Networks Junos OS versions prior to 20.3R2 Juniper Networks Junos OS versions prior to 20.4R2 Juniper Networks Junos OS Evolved versions prior to 20.4R2-S2-EVO

Description The issue is related to the receipt of a specific packet from the RPKI cache server, which may cause the routing process daemon (RPD) to crash and restart, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This is due to insufficient validation of unusual or exceptional states.

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

Fix

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

BDU:2021-03864

CVE-2021-0281

Affected Products

Junos

Junos Evolved

References · 6

• https://osv.dev/vulnerability/CVE-2021-0281 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0281 · Security Note
• https://bdu.fstec.ru/vul/2021-03864 · Security Note
• https://kb.juniper.net/JSA11185 · Vendor Advisory
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11185&actp=METADATA · Note
• https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11185&actp=METADATA · Note