VDB-176872 · CVE-2021-20591 · GCVE-0-2021-20591

Mitsubishi Electricssion MELSEC iQ-R series CPU Module MELSOFT Transmission Port resource consumption

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 labeled as problematic has been found in Mitsubishi Electricssion MELSEC iQ-R series CPU Module. This vulnerability affects unknown code of the component MELSOFT Transmission Port. Executing a manipulation can lead to resource consumption. This vulnerability is tracked as CVE-2021-20591. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Mitsubishi Electricssion MELSEC iQ-R series CPU Module (Chip Software) (the affected version unknown) and classified as problematic. This vulnerability affects an unknown part of the component MELSOFT Transmission Port. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability.

The weakness was disclosed 06/11/2021. The advisory is shared for download at mitsubishielectric.com. This vulnerability was named CVE-2021-20591. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Chip Software

Vendor

Mitsubishi Electricssion

Name

MELSEC iQ-R series CPU Module

License

commercial

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

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: Resource consumption
CWE: CWE-400 / CWE-404
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
06/11/2021 +175 days 🔍
06/11/2021 +0 days 🔍
06/13/2021 +2 days 🔍

Sourcesinfo

Advisory: mitsubishielectric.com
Status: Confirmed

CVE: CVE-2021-20591 (🔍)
GCVE (CVE): GCVE-0-2021-20591
GCVE (VulDB): GCVE-100-176872

Entryinfo

Created: 06/11/2021 23:14
Updated: 06/13/2021 16:54
Changes: 06/11/2021 23:14 (36), 06/13/2021 16:54 (2)
Complete: 🔍
Cache ID: 216::103