CVE-2024-30389 - CVE House

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Status published Medium CVE-2024-30389

Junos OS: EX4300 Series: Firewall filter not blocking egress traffic

6.9 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Juniper Networks

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Affected Software

Junos OS

Vulnerable Versions:

21.4

Timeline

Official Publish: April 12th, 2024

Last Modified: August 2nd, 2024

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.