CVE-2021-34581— WAGO: Denial of Service vulnerability inside the OpenSSL implementation
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I. Basic Information for CVE-2021-34581
Vulnerability Information
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Vulnerability Title
WAGO: Denial of Service vulnerability inside the OpenSSL implementation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对已超过有效生命周期的资源丧失索引
Source: NVD (National Vulnerability Database)
Vulnerability Title
WAGO 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAGO是德国万可（WAGO）的一款750-88x系列可编程逻辑控制器。该设备专门为在工业环境下应用而设计的数字运算操作电子系统。 WAGO 750-831/xxx xxx、750-880/xxx xxx、750-881、750-889在FW4至FW15固件版本中的OpenSSL实现存在安全漏洞，攻击者可利用该漏洞在设备上造成拒绝服务DoS
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 |
|---|---|---|---|---|
| WAGO | 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 | FW4 ~ All* | - |
II. Public POCs for CVE-2021-34581
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://cert.vde.com/en-us/advisories/vde-2021-038x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-34581
IV. Related Vulnerabilities
Same vendor: WAGO
Same weakness: CWE-772
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Multer vulnerable to Denial of Service via resource exhausti - CVE-2025-14969
Hibernate-reactive-core: hibernate reactive: denial of servi
V. Comments for CVE-2021-34581
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