CVE-2020-27738
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I. Basic Information for CVE-2020-27738
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
在缓冲区结束位置之后访问内存
Source: NVD (National Vulnerability Database)
Vulnerability Title
多款siemens产品 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens TALON Series是德国西门子（Siemens）公司的一个开放系统。使控制器和应用程序在单个平台上运行，同时彼此互操作。 多款siemens产品存在缓冲区错误漏洞，攻击者可利用该漏洞导致拒绝服务。
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 |
|---|---|---|---|---|
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.5 | - | |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.20 | - | |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.5 | - | |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.20 | - | |
| Siemens | Nucleus NET | All versions | - | |
| Siemens | Nucleus ReadyStart V3 | All versions < V2017.02.3 | - | |
| Siemens | Nucleus ReadyStart V4 | All versions < V4.1.0 | - | |
| Siemens | Nucleus Source Code | Versions including affected DNS modules | - | |
| Siemens | SIMOTICS CONNECT 400 | All versions < V0.5.0.0 | - | |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.5 | - | |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.5 | - |
II. Public POCs for CVE-2020-27738
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2021-25663 | 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-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-788
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Cisco Secure Firewall Threat Defense Software Snort 3 Memory - CVE-2026-21316
Audition | Access of Memory Location After End of Buffer (CW - CVE-2025-36581
Dell PowerEdge Platform 14G AMD BIOS 安全漏洞 - CVE-2025-43580
Audition | Access of Memory Location After End of Buffer (CW
V. Comments for CVE-2020-27738
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