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CVE-2021-38578

Quick assessment

Affected
TianoCore EDK II
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.

Tianocore Edk2是Tianocore社区的一个遵循UEFI和PI规范的跨平台固件开发环境。 Tianocore Edk2 存在安全漏洞，该漏洞源于在计算 BufferSize 时，SmmEntryPoint 中的现有 CommBuffer 检查不会捕获下溢。

CVSS 7.4 · High EPSS 1.02% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-38578

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区下溢
Source: CVE Program / CVE List V5
Vulnerability Title
Tianocore Edk2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tianocore Edk2是Tianocore社区的一个遵循UEFI和PI规范的跨平台固件开发环境。 Tianocore Edk2 存在安全漏洞，该漏洞源于在计算 BufferSize 时，SmmEntryPoint 中的现有 CommBuffer 检查不会捕获下溢。
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
TianoCore EDK II edk2-stable202208 -

II. Public POCs for CVE-2021-38578

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III. Intelligence Information for CVE-2021-38578

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Other References for CVE-2021-38578 (2)

IV. Related Vulnerabilities

Same product: EDK II
Same vendor: TianoCore
Same weakness: CWE-124

V. Comments for CVE-2021-38578

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