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CVE-2021-25663

Quick assessment

Affected
Siemens Capital Embedded AR Classic 431-422
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.

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。

CVSS 7.5 · High EPSS 1.88% · P78
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I. Basic Information for CVE-2021-25663

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
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

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III. Intelligence Information for CVE-2021-25663

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Vendor Advisories for CVE-2021-25663 (3)

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 product: Capital Embedded AR Classic 431-422
Same vendor: Siemens
Same weakness: CWE-835

V. Comments for CVE-2021-25663

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