CVE-2021-22275— Denial of service vulnerability on Automation Runtime webserver
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-120
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D-Link DI-8100 CGI user_group.asp sprintf buffer overflow - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow
V. Comments for CVE-2021-22275
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