CVE-2021-27391
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I. Basic Information for CVE-2021-27391
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in APOGEE MBC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE MEC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). The web server of affected devices lacks proper bounds checking when parsing the Host parameter in HTTP requests, which could lead to a buffer overflow. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the device with root privileges.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Siemens APOGEE MBC 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens APOGEE MBC是德国西门子（Siemens）公司的一个模块化楼宇控制器。 Siemens APOGEE MBC 存在缓冲区错误漏洞，该漏洞源于产品在解析请求时缺乏适当的边界检查。攻击者可通过该漏洞在执行具备root权限的命令。以下产品及版本受到影响: Siemens APOGEE MBC (PPC) (P2以太网) V2.6.3 版本、APOGEE MEC (PPC) (P2以太网) V2.6.3版本、 APOGEE PXC Compact (BACnet) V3.5.3 之前版本，
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 MBC (PPC) (P2 Ethernet) | All versions >= V2.6.3 | - | |
| Siemens | APOGEE MEC (PPC) (P2 Ethernet) | All versions >= V2.6.3 | - | |
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.3 | - | |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions >= V2.8 | - | |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.3 | - | |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions >= V2.8 | - | |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.3 | - | |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.3 | - |
II. Public POCs for CVE-2021-27391
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Siemens · 2021-09-14 · 30 CVEs total
| CVE-2021-33737 | 7.5 HIGH | Siemens SIAMTIC CP343-1 缓冲区错误漏洞 |
| CVE-2021-37184 | Siemens Industrial Edge Management 授权问题漏洞 | |
| CVE-2019-10941 | SINEMA Server 访问控制错误漏洞 | |
| CVE-2021-25665 | Simcenter STAR-CCM+ Viewer 缓冲区错误漏洞 | |
| CVE-2021-31891 | Siemens Desigo CC 操作系统命令注入漏洞 | |
| CVE-2021-33716 | Siemens SIMATIC CP 1543-1和SIMATIC CP 1545-1 安全漏洞 | |
| CVE-2021-33719 | Siemens SIPROTEC 5 代码注入漏洞 | |
| CVE-2021-33720 | Siemens SIPROTEC 5 代码注入漏洞 | |
| CVE-2021-37173 | Siemens RUGGEDCOM 信息泄露漏洞 | |
| CVE-2021-37174 | Siemens RUGGEDCOM 授权问题漏洞 | |
| CVE-2021-37175 | Siemens RUGGEDCOM 授权问题漏洞 | |
| CVE-2021-37176 | Siemens Simcenter Femap 缓冲区错误漏洞 | |
| CVE-2021-37177 | Siemens SINEMA Remote Connect Server 访问控制错误漏洞 | |
| CVE-2021-37181 | 多款 Siemens 产品代码问题漏洞 | |
| CVE-2021-37183 | Siemens SINEMA Remote Connect Server 访问控制错误漏洞 | |
| CVE-2021-40357 | Siemens Teamcenter Active Workspace 路径遍历漏洞 | |
| CVE-2021-37186 | Siemens SIMATIC 安全特征问题漏洞 | |
| CVE-2021-37191 | Siemens SINEMA Remote Connect Server 安全漏洞 | |
| CVE-2021-37190 | Siemens SINEMA Remote Connect Server 信息泄露漏洞 | |
| CVE-2021-37192 | Siemens SINEMA Remote Connect Server 信息泄露漏洞 |
Showing top 20 of 30 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-120
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MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow - CVE-2026-7857
D-Link DI-8100 CGI user_group.asp sprintf buffer overflow - CVE-2026-7856
D-Link DI-8100 Web Management url_member.asp buffer overflow
V. Comments for CVE-2021-27391
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