Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-27393

Quick assessment

Affected
Siemens Nucleus NET
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 ReadyStart是德国Siemens公司的一个捆绑式解决方案。用于加速完整系统的快速启动并提供丰富的板级支持包 (Bsp) Siemens Nucleus 存在安全特征问题漏洞，攻击者可利用该漏洞污染DNS缓存或欺骗DNS解析。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.75% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-27393

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5
Vulnerability Title
Nucleus ReadyStart安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens Nucleus ReadyStart是德国Siemens公司的一个捆绑式解决方案。用于加速完整系统的快速启动并提供丰富的板级支持包 (Bsp) Siemens Nucleus 存在安全特征问题漏洞，攻击者可利用该漏洞污染DNS缓存或欺骗DNS解析。
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 Nucleus NET All versions -
Siemens Nucleus ReadyStart V3 All versions < V2013.08 -
Siemens Nucleus Source Code Versions including affected DNS modules -

II. Public POCs for CVE-2021-27393

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-27393

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-27393 (1)

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-2021-25663 7.5 HIGH Siemens Nucleus 安全漏洞
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-2021-25668 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 vendor: Siemens
Same weakness: CWE-330

V. Comments for CVE-2021-27393

No comments yet

Leave a comment