CVE-2024-39534 Junos OS Evolved: Connections to the network and broadcast address accepted
An unauthenticated attacker can bypass firewall filters by sending traffic to network and broadcast addresses on Junos OS Evolved devices.
- 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-2024-39534?
CVE-2024-39534 is a medium-severity vulnerability in Juniper Junos Os Evolved, published on 11 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An Incorrect Comparison vulnerability in the local address verification API of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker to create sessions or send traffic to the device using the network and broadcast address of the subnet assigned to an interface. This is unintended and unexpected behavior and can allow an attacker to bypass certain compensating controls, such as stateless firewall filters.
This issue affects Junos OS Evolved:
* All versions before 21.4R3-S8-EVO, * 22.2-EVO before 22.2R3-S4-EVO, * 22.3-EVO before 22.3R3-S4-EVO, * 22.4-EVO before 22.4R3-S3-EVO, * 23.2-EVO before 23.2R2-S1-EVO, * 23.4-EVO before 23.4R1-S2-EVO, 23.4R2-EVO.
Weakness: CWE-697
Which versions are affected by CVE-2024-39534?
It affects 1 product.
Products include Juniper Junos Os Evolved.
How do I fix CVE-2024-39534?
No fix has been published for CVE-2024-39534 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-39534 being exploited?
There is no known exploitation of CVE-2024-39534 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-mjfx-92v4-6mf3.