PT-2023-4148 · Juniper Networks · Junos Evolved+1

Published 2023-07-12 · Updated 2023-07-27 · CVE-2023-36840

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/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 19.3R3-S10 Juniper Networks Junos OS versions 20.1 prior to 20.1R3-S4 Juniper Networks Junos OS versions 20.2 prior to 20.2R3-S6 Juniper Networks Junos OS versions 20.3 prior to 20.3R3-S6 Juniper Networks Junos OS versions 20.4 prior to 20.4R3-S5 Juniper Networks Junos OS versions 21.1 prior to 21.1R3-S4 Juniper Networks Junos OS versions 21.2 prior to 21.2R3-S3 Juniper Networks Junos OS versions 21.3 prior to 21.3R3-S2 Juniper Networks Junos OS versions 21.4 prior to 21.4R3 Juniper Networks Junos OS versions 22.1 prior to 22.1R3 Juniper Networks Junos OS versions 22.2 prior to 22.2R2 Juniper Networks Junos OS versions 22.3 prior to 22.3R2 Juniper Networks Junos OS Evolved versions prior to 20.4R3-S7-EVO Juniper Networks Junos OS Evolved versions 21.1 prior to 21.1R3-S3-EVO Juniper Networks Junos OS Evolved versions 21.2 prior to 21.2R3-S5-EVO Juniper Networks Junos OS Evolved versions 21.3 prior to 21.3R3-S4-EVO Juniper Networks Junos OS Evolved versions 21.4 prior to 21.4R3-EVO Juniper Networks Junos OS Evolved versions 22.1 prior to 22.1R3-EVO Juniper Networks Junos OS Evolved versions 22.2 prior to 22.2R2-EVO Juniper Networks Junos OS Evolved versions 22.3 prior to 22.3R2-EVO

Description A Reachable Assertion vulnerability in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a locally-based, low-privileged attacker to cause a Denial of Service (DoS). When a specific L2VPN command is run, RPD will crash and restart. Continued execution of this specific command will create a sustained Denial of Service (DoS) condition.

Recommendations For Juniper Networks Junos OS versions prior to 19.3R3-S10, update to version 19.3R3-S10 or later. For Juniper Networks Junos OS versions 20.1 prior to 20.1R3-S4, update to version 20.1R3-S4 or later. For Juniper Networks Junos OS versions 20.2 prior to 20.2R3-S6, update to version 20.2R3-S6 or later. For Juniper Networks Junos OS versions 20.3 prior to 20.3R3-S6, update to version 20.3R3-S6 or later. For Juniper Networks Junos OS versions 20.4 prior to 20.4R3-S5, update to version 20.4R3-S5 or later. For Juniper Networks Junos OS versions 21.1 prior to 21.1R3-S4, update to version 21.1R3-S4 or later. For Juniper Networks Junos OS versions 21.2 prior to 21.2R3-S3, update to version 21.2R3-S3 or later. For Juniper Networks Junos OS versions 21.3 prior to 21.3R3-S2, update to version 21.3R3-S2 or later. For Juniper Networks Junos OS versions 21.4 prior to 21.4R3, update to version 21.4R3 or later. For Juniper Networks Junos OS versions 22.1 prior to 22.1R3, update to version 22.1R3 or later. For Juniper Networks Junos OS versions 22.2 prior to 22.2R2, update to version 22.2R2 or later. For Juniper Networks Junos OS versions 22.3 prior to 22.3R2, update to version 22.3R2 or later. For Juniper Networks Junos OS Evolved versions prior to 20.4R3-S7-EVO, update to version 20.4R3-S7-EVO or later. For Juniper Networks Junos OS Evolved versions 21.1 prior to 21.1R3-S3-EVO, update to version 21.1R3-S3-EVO or later. For Juniper Networks Junos OS Evolved versions 21.2 prior to 21.2R3-S5-EVO, update to version 21.2R3-S5-EVO or later. For Juniper Networks Junos OS Evolved versions 21.3 prior to 21.3R3-S4-EVO, update to version 21.3R3-S4-EVO or later. For Juniper Networks Junos OS Evolved versions 21.4 prior to 21.4R3-EVO, update to version 21.4R3-EVO or later. For Juniper Networks Junos OS Evolved versions 22.1 prior to 22.1R3-EVO, update to version 22.1R3-EVO or later. For Juniper Networks Junos OS Evolved versions 22.2 prior to 22.2R2-EVO, update to version 22.2R2-EVO or later. For Juniper Networks Junos OS Evolved versions 22.3 prior to 22.3R2-EVO, update to version 22.3R2-EVO or later.

Fix

DoS

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2023-04459

CVE-2023-36840

Affected Products

Junos

Junos Evolved

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2023-36840 · Security Note
• https://supportportal.juniper.net/JSA71647 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-36840 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-04459 · Security Note
• https://t.me/cibsecurity/66760 · Telegram Post