CVE-2021-26353
Quick assessment
Affected
AMD 3rd Gen EPYC
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.
AMD EPYC是美国超威半导体（AMD）公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC DRTM UApp存在安全漏洞，该漏洞源于DRTM UApp处于部分初始化状态，从而导致UApp处理后续邮箱命令时存在未经检查的内存写入漏洞。
Possible ATT&CK Techniques 1 AI
T1621 · Multi-Factor Authentication Request Generation
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I. Basic Information for CVE-2021-26353
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
AMD EPYC DRTM UApp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AMD EPYC是美国超威半导体（AMD）公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC DRTM UApp存在安全漏洞，该漏洞源于DRTM UApp处于部分初始化状态，从而导致UApp处理后续邮箱命令时存在未经检查的内存写入漏洞。
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 |
|---|---|---|---|---|
| AMD | 3rd Gen EPYC | various | - |
|
II. Public POCs for CVE-2021-26353
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-26353 (1)
Same Patch Batch · AMD · 2022-05-10 · 8 CVEs total
| CVE-2021-46771 | AMD Secure Processor 安全漏洞 | |
| CVE-2021-26324 | AMD EPYC SEV-ES TMR 安全漏洞 | |
| CVE-2021-26332 | AMD Secure Encrypted Virtualization 安全漏洞 | |
| CVE-2021-26352 | AMD System Management Unit 缓冲区错误漏洞 | |
| CVE-2021-26370 | AMD EPYC UApp/ABL 输入验证错误漏洞 | |
| CVE-2021-26390 | AMD EPYC 安全漏洞 | |
| CVE-2021-26408 | AMD SEV-legacy 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-26353
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