CVE-2023-44195 Junos OS Evolved: Packets which are not destined to the router can reach the RE
An unauthenticated attacker can bypass firewall filters to send packets to the Routing Engine, causing resource exhaustion and potential unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-44195?
CVE-2023-44195 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 12 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-923
Which versions are affected by CVE-2023-44195?
It affects 1 product.
Products include Juniper Junos Os Evolved.
How do I fix CVE-2023-44195?
No fix has been published for CVE-2023-44195 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-44195 being exploited?
There is no known exploitation of CVE-2023-44195 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos Os Evolved
- CVE-2026-21902 Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root
- CVE-2023-28983 Junos OS Evolved: Shell Injection vulnerability in the gNOI server
- CVE-2025-21599 Denial of service in Junos OS Evolved
- CVE-2024-47502 Junos OS Evolved: TCP session state is not always cleared on the Routing Engine leading to DoS
- CVE-2024-39531 Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols
Sources
Also known as GHSA-f7rx-678f-vf6q.