Juniper Junos OS on QFX5000/EX4600 Packet Forwarding Engine incomplete blacklist

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Juniper Junos OS on QFX5000/EX4600. This affects an unknown function of the component Packet Forwarding Engine. The manipulation results in incomplete blacklist. This vulnerability is cataloged as CVE-2021-31370. The attack must originate from the local network. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Juniper Junos OS on QFX5000/EX4600 (Router Operating System) (version unknown). Affected is an unknown function of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a incomplete blacklist vulnerability. CWE is classifying the issue as CWE-184. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. This is going to have an impact on availability.

The weakness was shared 10/20/2021 as JSA11232. The advisory is available at kb.juniper.net. This vulnerability is traded as CVE-2021-31370 since 04/15/2021. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1562.006 by the MITRE ATT&CK project.

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Productinfo

Type

Router Operating System

Vendor

Juniper

Name

Junos OS

License

commercial

Website

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

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (Juniper Networks, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Incomplete blacklist
CWE: CWE-184 / CWE-183 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: 🔍

Timelineinfo

04/15/2021 🔍
10/20/2021 +188 days 🔍
10/20/2021 +0 days 🔍
10/27/2021 +7 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA11232
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-31370 (🔍)
GCVE (CVE): GCVE-0-2021-31370
GCVE (VulDB): GCVE-100-185094

Entryinfo

Created: 10/20/2021 11:16
Updated: 10/27/2021 21:12
Changes: 10/20/2021 11:16 (50), 10/27/2021 21:04 (2), 10/27/2021 21:12 (7)
Complete: 🔍
Cache ID: 216::103