CVE-2024-30389

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

State: Published
Severity: 6.9 Medium
Published: Apr 12, 2024
Updated: Aug 2, 2024
Reserved: Mar 26, 2024

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N	juniper
3.1	5.8 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	juniper

Weaknesses

CWE-696 Incorrect Behavior Order

Affected Products

Product	Versions
Junos OSJuniper Networks	21.4 to before 21.4R3-S6Affected 21.4 to before 21.4R1Not affected

References

http://supportportal.juniper.net/JSA79185vendor-advisory
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:Ntechnical-description

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