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I. Basic Information for CVE-2021-33625
Vulnerability Information

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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Insyde InsydeH2O 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Insyde InsydeH2O是中国台湾系微(Insyde)公司的一个 C 语言源,它实现了新技术“EFI/UEFI”规范,旨在取代传统的 BIOS(基本输入/输出系统)。 Insyde InsydeH2O Hardware-2-Operating System (H2O) UEFI固件存在缓冲区错误漏洞,该漏洞允许攻击者将固定或可预测的数据写入 SMRAM。利用此问题可能会导致 SMM 的权限升级。
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
VendorProductAffected VersionsCPESubscribe
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II. Public POCs for CVE-2021-33625
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III. Intelligence Information for CVE-2021-33625
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IV. Related Vulnerabilities
V. Comments for CVE-2021-33625

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