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AUSCERT External Security Bulletin Redistribution
ESB-2024.2236
2024-04 Security Bulletin: Junos OS and Junos OS Evolved: The l2ald crashes
on receiving telemetry messages from a specific subscription
(CVE-2024-30402)
11 April 2024
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AusCERT Security Bulletin Summary
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Product: Junos OS
Junos OS Evolved
Publisher: Juniper Networks
Operating System: Juniper
Resolution: Patch/Upgrade
CVE Names: CVE-2024-30402
Original Bulletin:
https://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-The-l2ald-crashes-on-receiving-telemetry-messages-from-a-specific-subscription-CVE-2024-30402
Comment: CVSS (Max): 5.9 CVE-2024-30402 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Juniper Networks
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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Article ID: JSA79180
Product Affected: This issue affects Junos OS 20.4, 21.2, 21.4, 22.1, 22.2,
22.3, 22.4, 23.2. This issue affects Junos OS Evolved 21.4-EVO, 22.1-EVO,
22.2-EVO, 22.3-EVO, 22.4-EVO, 23.2-EVO.
Severity Level: Medium
CVSS Score: CVSS 3.1
Problem:
An Improper Check for Unusual or Exceptional Conditions vulnerability in the
Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos
OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of
Service (DoS).
When telemetry requests are sent to the device, and the Dynamic Rendering
Daemon (drend) is suspended, the l2ald crashes and restarts due to factors
outside the attackers control. Repeated occurrences of these events causes a
sustained DoS condition.
This issue affects:
Junos OS:
o All versions earlier than 20.4R3-S10;
o 21.2 versions earlier than 21.2R3-S7;
o 21.4 versions earlier than 21.4R3-S5;
o 22.1 versions earlier than 22.1R3-S4;
o 22.2 versions earlier than 22.2R3-S3;
o 22.3 versions earlier than 22.3R3-S1;
o 22.4 versions earlier than 22.4R3;
o 23.2 versions earlier than 23.2R1-S2, 23.2R2.
Junos OS Evolved:
o All versions earlier than 21.4R3-S5-EVO;
o 22.1-EVO versions earlier than 22.1R3-S4-EVO;
o 22.2-EVO versions earlier than 22.2R3-S3-EVO;
o 22.3-EVO versions earlier than 22.3R3-S1-EVO;
o 22.4-EVO versions earlier than 22.4R3-EVO;
o 23.2-EVO versions earlier than 23.2R2-EVO.
Solution:
The following software releases have been updated to resolve this specific
issue:
Junos OS: 20.4R3-S10, 21.2R3-S7, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S1,
22.4R3, 23.2R1-S2, 23.2R2, 23.4R1, and all subsequent releases.
Junos OS Evolved: 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S3-EVO, 22.3R3-S1-EVO,
22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO, and all subsequent releases.
This issue is being tracked as 1743744 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 supportportal.juniper.net/JSA79180
o https://www.cve.org/CVERecord?id=CVE-2024-30402
Last Updated: 2024-04-10
Created: 2024-04-10
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