CVE-2021-25663
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I. Basic Information for CVE-2021-25663
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes IPv6 headers does not check the lengths of extension header options, allowing attackers to put this function into an infinite loop with crafted length values.
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
不可达退出条件的循环(无限循环)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Siemens Nucleus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
siemens Nucleus是德国西门子（siemens）公司的一个工控设备。提供一个工控设备。 Siemens Nucleus存在安全漏洞，该漏洞源于程序处理IPv6头的函数不检查扩展头选项的长度，允许攻击者使用精心设计的长度值将该函数放入无限循环中。以下产品或版本受到影响：Nucleus 4、Nucleus NET、Nucleus ReadyStart、Nucleus Source Code、VSTAR。
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 |
|---|---|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 | 0 ~ * | - | |
| Siemens | Capital Embedded AR Classic R20-11 | 0 ~ V2303 | - | |
| Siemens | Nucleus NET | All versions | - | |
| Siemens | Nucleus ReadyStart V3 | 0 ~ V2017.02.4 | - | |
| Siemens | Nucleus ReadyStart V4 | 0 ~ V4.1.0 | - | |
| Siemens | Nucleus Source Code | 0 ~ * | - |
II. Public POCs for CVE-2021-25663
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-25663
Same Patch Batch · Siemens · 2021-04-22 · 19 CVEs total
| CVE-2020-25244 | 8.4 HIGH | Siemens LOGO! Soft Comfort 代码问题漏洞 |
| CVE-2020-27009 | 8.1 HIGH | 多款Siemens产品 缓冲区错误漏洞 |
| CVE-2020-15795 | 8.1 HIGH | 多款siemens产品 缓冲区错误漏洞 |
| CVE-2021-25664 | 7.5 HIGH | Siemens Nucleus 安全漏洞 |
| CVE-2020-27737 | 6.5 MEDIUM | 多款siemens产品 缓冲区错误漏洞 |
| CVE-2020-27736 | 6.5 MEDIUM | 多款siemens产品 缓冲区错误漏洞 |
| CVE-2020-27738 | 6.5 MEDIUM | 多款siemens产品 缓冲区错误漏洞 |
| CVE-2021-25677 | 5.3 MEDIUM | 多款Siemens产品 安全特征问题漏洞 |
| CVE-2020-25243 | 5.1 MEDIUM | Siemens LOGO! Soft Comfort 路径遍历漏洞 |
| CVE-2021-27393 | Nucleus ReadyStart安全特征问题漏洞 | |
| CVE-2021-25668 | Siemens Web Server缓冲区错误漏洞 | |
| CVE-2021-25669 | Siemens Web Server 缓冲区错误漏洞 | |
| CVE-2021-27392 | Siemens Open Network Bridge 信任管理问题漏洞 | |
| CVE-2021-27389 | Siemens Digital Industries Software Opcenter Quality 安全漏洞 | |
| CVE-2020-26997 | Siemens Solid Edge 安全漏洞 | |
| CVE-2021-27382 | Siemens Solid Edge 缓冲区错误漏洞 | |
| CVE-2021-25678 | Siemens Solid Edge 缓冲区错误漏洞 | |
| CVE-2021-25670 | siemens Tecnomatix RobotExpert 缓冲区错误漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-835
- CVE-2026-42310
Pillow: PDF Parsing Trailer Infinite Loop (DoS) - CVE-2026-41511
OpenMcdf has an Infinite loop DoS via crafted CFB directory - CVE-2026-5407
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6536
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6534
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi
V. Comments for CVE-2021-25663
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