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CVE-2021-22275— Denial of service vulnerability on Automation Runtime webserver

Quick assessment

Affected
B&R Automation Automation Runtime webserver
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.

B&R Automation Runtime是奥地利贝加莱工业自动化（B&R Automation）公司的是AS的主要组件。 B&R Automation Runtime 4.91 之前版本存在安全漏洞，该漏洞源于网络服务器中不适当的缓冲区限制。未经身份验证的攻击者利用该漏洞可停止设备上的循环程序并导致拒绝服务。

CVSS 8.6 · High EPSS 0.92% · P57

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-22275

Vulnerability Information
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Vulnerability Title
Denial of service vulnerability on Automation Runtime webserver
Source: CVE Program / CVE List V5
Vulnerability Description
Buffer Overflow vulnerability in B&R Automation Runtime webserver allows an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
B&R Automation Runtime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
B&R Automation Runtime是奥地利贝加莱工业自动化（B&R Automation）公司的是AS的主要组件。 B&R Automation Runtime 4.91 之前版本存在安全漏洞，该漏洞源于网络服务器中不适当的缓冲区限制。未经身份验证的攻击者利用该漏洞可停止设备上的循环程序并导致拒绝服务。
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
B&R Automation Automation Runtime webserver unspecified ~ 4.91 -

II. Public POCs for CVE-2021-22275

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III. Intelligence Information for CVE-2021-22275

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Other References for CVE-2021-22275 (1)

IV. Related Vulnerabilities

Same weakness: CWE-120

V. Comments for CVE-2021-22275

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