CVE-2024-30389: Junos OS: EX4300 Series: Firewall filter not blocking egress traffic
First published: Fri Apr 12 2024(Updated: )
An Incorrect Behavior Order vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on EX4300 Series allows an unauthenticated, network-based attacker to cause an integrity impact to networks downstream of the vulnerable device. When an output firewall filter is applied to an interface it doesn't recognize matching packets but permits any traffic. This issue affects Junos OS 21.4 releases from 21.4R1 earlier than 21.4R3-S6. This issue does not affect Junos OS releases earlier than 21.4R1.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Any of | ||
| Junos OS Evolved | =21.4-r1 | |
| Junos OS Evolved | =21.4-r1-s1 | |
| Junos OS Evolved | =21.4-r1-s2 | |
| Junos OS Evolved | =21.4-r2 | |
| Junos OS Evolved | =21.4-r2-s1 | |
| Junos OS Evolved | =21.4-r2-s2 | |
| Junos OS Evolved | =21.4-r3 | |
| Junos OS Evolved | =21.4-r3-s1 | |
| Junos OS Evolved | =21.4-r3-s2 | |
| Junos OS Evolved | =21.4-r3-s3 | |
| Junos OS Evolved | =21.4-r3-s4 | |
| Junos OS Evolved | =21.4-r3-s5 | |
| Any of | ||
| Juniper EX4300-24T | ||
| Juniper EX4300-24P | ||
| Juniper EX4300 | ||
| Juniper EX4300-24T-S | ||
| Juniper EX4300 | ||
| Juniper EX4300-32F-S | ||
| Juniper EX4300 | ||
| Juniper EX4300-32F-S | ||
| Juniper EX4300-48MP | ||
| Juniper EX4300-48MP-S | ||
| Juniper EX4300-48P | ||
| Juniper EX4300-48P | ||
| Juniper EX4300-48T-AFI | ||
| Juniper EX4300-48TAFI | ||
| Juniper EX4300-48TDC | ||
| Juniper EX4300-48TDC-AFI | ||
| Juniper EX4300-48T-S | ||
| Juniper JUNOS | >=21.4R1<21.4R3-S6 |
Remedy
The following software release has been updated to resolve this specific issue: 21.4R3-S6, and all subsequent releases of this branch.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-30389?
CVE-2024-30389 has a low severity rating, reflecting a minor integrity impact to downstream networks.
How do I fix CVE-2024-30389?
To fix CVE-2024-30389, upgrade Junos OS to a patched version beyond 21.4R3-S6.
What devices are affected by CVE-2024-30389?
CVE-2024-30389 affects Juniper Networks Junos OS on EX4300 Series devices between versions 21.4R1 and 21.4R3-S6.
Is CVE-2024-30389 exploitable remotely?
Yes, CVE-2024-30389 can be exploited by an unauthenticated, network-based attacker.
What type of vulnerability is CVE-2024-30389?
CVE-2024-30389 is classified as an Incorrect Behavior Order vulnerability in the Packet Forwarding Engine.
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