CVE-2023-44195: Junos OS Evolved: Packets which are not destined to the router can reach the RE
First published: Thu Oct 12 2023(Updated: )
An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the NetworkStack agent daemon (nsagentd) of Juniper Networks Junos OS Evolved allows an unauthenticated network based attacker to cause limited impact to the availability of the system. If specific packets reach the Routing-Engine (RE) these will be processed normally even if firewall filters are in place which should have prevented this. This can lead to a limited, increased consumption of resources resulting in a Denial-of-Service (DoS), and unauthorized access. CVE-2023-44196 is a prerequisite for this issue. This issue affects Juniper Networks Junos OS Evolved: * 21.3-EVO versions prior to 21.3R3-S5-EVO; * 21.4-EVO versions prior to 21.4R3-S4-EVO; * 22.1-EVO version 22.1R1-EVO and later; * 22.2-EVO version 22.2R1-EVO and later; * 22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO; * 22.4-EVO versions prior to 22.4R3-EVO. This issue doesn't not affected Junos OS Evolved versions prior to 21.3R1-EVO.
Credit: sirt@juniper.net sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Junos Os Evolved | =21.4 | |
| Juniper Junos Os Evolved | =21.4-r1 | |
| Juniper Junos Os Evolved | =21.4-r1-s1 | |
| Juniper Junos Os Evolved | =21.4-r1-s2 | |
| Juniper Junos Os Evolved | =21.4-r2 | |
| Juniper Junos Os Evolved | =21.4-r2-s1 | |
| Juniper Junos Os Evolved | =21.4-r2-s2 | |
| Juniper Junos Os Evolved | =21.4-r3 | |
| Juniper Junos Os Evolved | =21.4-r3-s1 | |
| Juniper Junos Os Evolved | =21.4-r3-s2 | |
| Juniper Junos Os Evolved | =21.4-r3-s3 | |
| Juniper Junos Os Evolved | =22.1 | |
| Juniper Junos Os Evolved | =22.2 | |
| Juniper Junos Os Evolved | =22.2-r1 | |
| Juniper Junos Os Evolved | =22.2-r1-s1 | |
| Juniper Junos Os Evolved | =22.2-r2 | |
| Juniper Junos Os Evolved | =22.2-r2-s1 | |
| Juniper Junos Os Evolved | =22.2-r2-s2 | |
| Juniper Junos Os Evolved | =22.3 | |
| Juniper Junos Os Evolved | =22.3-r1 | |
| Juniper Junos Os Evolved | =22.3-r1-s1 | |
| Juniper Junos Os Evolved | =22.3-r2 | |
| Juniper Junos Os Evolved | =22.3-r2-s1 | |
| Juniper Junos Os Evolved | =22.3-r2-s2 | |
| Juniper Junos Os Evolved | =22.3-r3-s1 | |
| Juniper Junos Os Evolved | =22.4 | |
| Juniper Junos Os Evolved | =22.4-r1 | |
| Juniper Junos Os Evolved | =22.4-r1-s1 | |
| Juniper Junos Os Evolved | =22.4-r1-s2 | |
| Juniper Junos Os Evolved | =22.4-r2 | |
| Juniper Junos Os Evolved | =22.4-r2-s1 | |
| Juniper Junos Os Evolved | =22.4-r2-s2 | |
| Juniper Junos Os Evolved | =23.1-r1 | |
| Juniper Junos Os Evolved | =23.1-r2 | |
| Juniper Junos Os Evolved | =23.1-r3 | |
| Juniper Junos Os Evolved | =23.2-r1-s1 | |
| Juniper Junos Os Evolved | =23.2-r1-s2 | |
| Juniper Junos Os Evolved | =23.2-r2-s1 | |
| Juniper Junos Os Evolved | =23.2-r2-s2 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS Evolved 21.3R3-S5-EVO, 21.4R3-S4-EVO, 22.3R2-S2-EVO, 22.3R3-S1-EVO, 22.4R3-EVO, 23.2R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is CVE-2023-44195?
CVE-2023-44195 is an Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the NetworkStack agent daemon (nsagentd) of Juniper Networks Junos OS Evolved.
What is the severity of CVE-2023-44195?
The severity of CVE-2023-44195 is medium, with a severity value of 5.4.
How does CVE-2023-44195 affect Juniper Junos OS Evolved?
CVE-2023-44195 allows an unauthenticated network-based attacker to cause limited impact to the availability of the Juniper Junos OS Evolved.
How can I fix CVE-2023-44195?
To fix CVE-2023-44195, it is recommended to apply the necessary patches or updates provided by Juniper Networks.
Where can I find more information about CVE-2023-44195?
You can find more information about CVE-2023-44195 on the Juniper Networks support portal: https://supportportal.juniper.net/JSA73160
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