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AUSCERT External Security Bulletin Redistribution
ESB-2024.2216
2024-04 Security Bulletin: Junos OS: MX Series with SPC3 and MS-MPC/-MIC:
When URL filtering is enabled and a specific URL request is received a
flowd crash occurs (CVE-2024-30392)
11 April 2024
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AusCERT Security Bulletin Summary
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Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Resolution: Patch/Upgrade
CVE Names: CVE-2024-30392
Original Bulletin:
https://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-MX-Series-with-SPC3-and-MS-MPC-MIC-When-URL-filtering-is-enabled-and-a-specific-URL-request-is-received-a-flowd-crash-occurs-CVE-2024-30392
Comment: CVSS (Max): 7.5 CVE-2024-30392 (CVSS:3.1/AV:N/AC:L/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:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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Article ID: JSA79092
Product Affected: This issue affects all Junos OS versions before 21.2R3-S6,
21.3, 21.4, 22.1, 22.2, 22.3, 22.4. Affected platforms: MX Series with SPC3 and
MS-MPC.
Severity Level: High
CVSS Score: CVSS 3.1
Problem:
A Stack-based Buffer Overflow vulnerability in Flow Processing Daemon (flowd)
of Juniper Networks Junos OS allows an unauthenticated, network-based attacker
to cause Denial of Service (DoS).
On all Junos OS MX Series platforms with SPC3 and MS-MPC/-MIC, when URL
filtering is enabled and a specific URL request is received and processed,
flowd will crash and restart. Continuous reception of the specific URL request
will lead to a sustained Denial of Service (DoS) condition.
This issue affects Junos OS:
o All versions before 21.2R3-S6;
o from 21.3 before 21.3R3-S5;
o from 21.4 before 21.4R3-S5;
o from 22.1 before 22.1R3-S3;
o from 22.2 before 22.2R3-S1;
o from 22.3 before 22.3R2-S2, 22.3R3;
o from 22.4 before 22.4R2-S1, 22.4R3.
For the issue to occur, the following two conditions need to be met:
1. Enable URL filtering:
[jservices-urlf enable]
2. Configure the following template
[url-filter-template template {client-interfaces [] server-interfaces []
dns-server <IP_address> url-filter-database <db_name>}]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was discovered during production use.
This issue has been assigned CVE-2024-30392 .
Solution:
The following software releases have been updated to resolve this specific
issue: 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S3, 22.2R3-S1, 22.3R2-S2,
22.3R3, 22.4R2-S1, 22.4R3, 23.2R1, and all subsequent releases.
This issue is being tracked as 1731552 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 available 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-2024-30392
Last Updated: 2024-04-10
Created: 2024-04-10
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