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AUSCERT External Security Bulletin Redistribution
ESB-2024.2222
2024-04 Security Bulletin: Junos OS Evolved: Packets which are not destined
to the device can reach the RE (CVE-2024-21590)
11 April 2024
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AusCERT Security Bulletin Summary
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Product: Junos OS Evolved
Publisher: Juniper Networks
Operating System: Juniper
Resolution: Patch/Upgrade
CVE Names: CVE-2024-21590
Original Bulletin:
https://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-Evolved-Packets-which-are-not-destined-to-the-device-can-reach-the-RE-CVE-2024-21590
Comment: CVSS (Max): 7.1 CVE-2024-21590 (CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
CVSS Source: Juniper Networks
Calculator: https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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Article ID: JSA75728
Product Affected: This issue affects all versions of Junos OS Evolved before
21.2-EVO, 21.4-EVO, 22.2-EVO, 22.3-EVO, 22.4-EVO, 23.2-EVO, 23.4-EVO.
Severity Level: Medium
CVSS Score: CVSS 4.0: 7.1 CVSS4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Problem:
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and
ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated
attacker within the MPLS administrative domain to send specifically crafted
packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet
Forwarding Engine (PFE), these packets are internally forwarded to the RE.
Continued receipt of these packets may create a sustained Denial of Service
(DoS) condition.
This issue affects Juniper Networks Junos OS Evolved:
o All versions before 21.2R3-S8-EVO;
o from 21.4-EVO before 21.4R3-S6-EVO;
o from 22.2-EVO before 22.2R3-S4-EVO;
o from 22.3-EVO before 22.3R3-S3-EVO;
o from 22.4-EVO before 22.4R3-EVO;
o from 23.2-EVO before 23.2R2-EVO;
o from 23.4-EVO before 23.4R1-S1-EVO.
Solution:
The following software releases have been updated to resolve this specific
issue:
Junos OS Evolved:21.2R3-S8-EVO, 21.4R3-S6-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO,
22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO, 23.4R1-S1-EVO, 24.1R1-EVO and all
subsequent releases.
This issue is being tracked as 1731219 which is visible on the Customer Support
website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of
Engineering (EOE) or End of Life (EOL).
Workaround:
There are no known workarounds for this issue.
Modification History:
2024-04-10: Initial Publication
Related Information:
o KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin
Publication Process
o KB16765: In which releases are vulnerabilities fixed?
o KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security
Advisories
o Report a Security Vulnerability - How to Contact the Juniper Networks
Security Incident Response Team
o https://www.cve.org/CVERecord?id=CVE-2024-21590
Last Updated: 2024-04-10
Created: 2024-04-10
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