Juniper Junos OS up to 21.4R3-S5 on EX4300 Packet Forwarding Engine incorrect behavior order

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Juniper Junos OS up to 21.4R3-S5 on EX4300. This vulnerability affects unknown code of the component Packet Forwarding Engine. The manipulation leads to incorrect behavior order. This vulnerability is traded as CVE-2024-30389. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos OS up to 21.4R3-S5 on EX4300. It has been rated as problematic. This issue affects some unknown functionality of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a incorrect behavior order vulnerability. Using CWE to declare the problem leads to CWE-696. The product performs multiple related behaviors, but the behaviors are performed in the wrong order in ways which may produce resultant weaknesses. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at supportportal.juniper.net. The identification of this vulnerability is CVE-2024-30389 since 03/26/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/07/2025).

Upgrading to version 21.4R1 or 21.4R3-S6 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Router Operating System

Vendor

Juniper

Name

Junos OS

Version

21.4R3-S5

License

commercial

Website

Vendor: https://www.juniper.net/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.8
CNA Vector (Juniper Networks, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect behavior order
CWE: CWE-696
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Junos OS 21.4R1/21.4R3-S6

Timelineinfo

03/26/2024 🔍
04/12/2024 +16 days 🔍
04/12/2024 +0 days 🔍
02/07/2025 +301 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA79185
Status: Confirmed

CVE: CVE-2024-30389 (🔍)
GCVE (CVE): GCVE-0-2024-30389
GCVE (VulDB): GCVE-100-260549

Entryinfo

Created: 04/12/2024 17:45
Updated: 02/07/2025 04:48
Changes: 04/12/2024 17:45 (65), 05/22/2024 08:46 (1), 02/07/2025 04:48 (14)
Complete: 🔍
Cache ID: 216::103