CVE-2021-20591
Quick assessment
Affected
n/a MELSEC iQ-R series CPU modules
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-R Series 的 CPU 单元的 MELSOFT 通信端口 (TCP/IP) 中存在资源管理错误漏洞，该漏洞源于远程第三方保持连接到 MELSOFT 通信端口 (TCP/IP)，MELSOFT 通信端口 (TCP/IP) 的资源将被耗尽。攻击者可通过该漏洞引发DOS攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2021-20591
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly, which may lead to a denial of service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mitsubishi Electric MELSEC iQ-R series 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-R Series 的 CPU 单元的 MELSOFT 通信端口 (TCP/IP) 中存在资源管理错误漏洞，该漏洞源于远程第三方保持连接到 MELSOFT 通信端口 (TCP/IP)，MELSOFT 通信端口 (TCP/IP) 的资源将被耗尽。攻击者可通过该漏洞引发DOS攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | MELSEC iQ-R series CPU modules | R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions | - |
|
II. Public POCs for CVE-2021-20591
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-20591
请登录查看更多情报信息。
Vendor Advisories for CVE-2021-20591 (1)
-
https://jvn.jp/vu/JVNVU98060539/index.html x_refsource_MISC
Other References for CVE-2021-20591 (1)
Same Patch Batch · n/a · 2021-06-11 · 79 CVEs total
| CVE-2021-34679 | 10.0 CRITICAL | Thycotic Password Reset Server 信息泄露漏洞 |
| CVE-2021-21808 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-0472 | Google Android 安全漏洞 | |
| CVE-2021-32930 | Advantech Iview 访问控制错误漏洞 | |
| CVE-2021-32932 | Advantech Iview SQL注入漏洞 | |
| CVE-2021-21795 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-21833 | Accusoft ImageGear 输入验证错误漏洞 | |
| CVE-2021-22906 | Nextcloud 资源管理错误漏洞 | |
| CVE-2021-22905 | Nextcloud 信息泄露漏洞 | |
| CVE-2021-22904 | Ruby 安全漏洞 | |
| CVE-2021-21824 | Accusoft ImageGear 缓冲区错误漏洞 | |
| CVE-2021-27408 | Mmemed Welch Allyn Connex 缓冲区错误漏洞 | |
| CVE-2021-27410 | Mmemed Welch Allyn Connex 缓冲区错误漏洞 | |
| CVE-2019-9475 | Google Android 安全漏洞 | |
| CVE-2021-0466 | Google Android 安全特征问题漏洞 | |
| CVE-2021-0476 | Google Android 资源管理错误漏洞 | |
| CVE-2021-0481 | Google Android 输入验证错误漏洞 | |
| CVE-2021-0482 | Google Android 资源管理错误漏洞 | |
| CVE-2021-0484 | Google Android 信息泄露漏洞 | |
| CVE-2021-22915 | Nextcloud server 处理逻辑错误漏洞 |
Showing top 20 of 79 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-20591
No comments yet