CVE-2024-30389

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

Published Apr 12, 2024 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

The following software release has been updated to resolve this specific issue: 21.4R3-S6, and all subsequent releases of this branch.


Vendor Workaround

While there is no known workarounds for this issue, it is possible to recover by deactivating and then activating the filter. But please note that the issue might reoccur after a reboot or pfe restart.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2024-28310 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.
History
Type Values Removed Values Added
First Time appeared Juniper
Juniper ex4300
Juniper ex4300-24p
Juniper ex4300-24p-s
Juniper ex4300-24t
Juniper ex4300-24t-s
Juniper ex4300-32f
Juniper ex4300-32f-dc
Juniper ex4300-32f-s
Juniper ex4300-48mp
Juniper ex4300-48mp-s
Juniper ex4300-48p
Juniper ex4300-48p-s
Juniper ex4300-48t
Juniper ex4300-48t-afi
Juniper ex4300-48t-dc
Juniper ex4300-48t-dc-afi
Juniper ex4300-48t-s
Juniper junos
Weaknesses NVD-CWE-Other
CPEs cpe:2.3:h:juniper:ex4300-24p-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-24p:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-24t-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-24t:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-32f-dc:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-32f-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-32f:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48mp-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48mp:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48p-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48p:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48t-afi:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48t-dc-afi:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48t-dc:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48t-s:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300-48t:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ex4300:-:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*
Vendors & Products Juniper
Juniper ex4300
Juniper ex4300-24p
Juniper ex4300-24p-s
Juniper ex4300-24t
Juniper ex4300-24t-s
Juniper ex4300-32f
Juniper ex4300-32f-dc
Juniper ex4300-32f-s
Juniper ex4300-48mp
Juniper ex4300-48mp-s
Juniper ex4300-48p
Juniper ex4300-48p-s
Juniper ex4300-48t
Juniper ex4300-48t-afi
Juniper ex4300-48t-dc
Juniper ex4300-48t-dc-afi
Juniper ex4300-48t-s
Juniper junos