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CVE-2021-21573

Quick assessment

Affected
Dell BIOSConnect
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.

DELL Dell BIOSConnect是美国戴尔（DELL）公司的一个基础平台，使 BIOS 可连接到 Dell 的 HTTP 后端，并通过 HTTP 方法加载映像。 Dell BIOSConnect feature 存在缓冲区错误漏洞，该漏洞允许本地访问系统的恶意管理员用户运行任意代码并绕过UEFI限制。

CVSS 7.2 · High EPSS 0.28% · P20
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I. Basic Information for CVE-2021-21573

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Dell BIOSConnect feature contains a buffer overflow vulnerability. An authenticated malicious admin user with local access to the system may potentially exploit this vulnerability to run arbitrary code and bypass UEFI restrictions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Dell BIOSConnect feature 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DELL Dell BIOSConnect是美国戴尔（DELL）公司的一个基础平台，使 BIOS 可连接到 Dell 的 HTTP 后端，并通过 HTTP 方法加载映像。 Dell BIOSConnect feature 存在缓冲区错误漏洞，该漏洞允许本地访问系统的恶意管理员用户运行任意代码并绕过UEFI限制。
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
Dell BIOSConnect unspecified ~ Gen 11, Gen 10 -

II. Public POCs for CVE-2021-21573

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III. Intelligence Information for CVE-2021-21573

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Other References for CVE-2021-21573 (1)

Same Patch Batch · Dell · 2021-06-24 · 4 CVEs total

CVE-2021-21572 7.2 HIGH Dell BIOSConnect feature 缓冲区错误漏洞
CVE-2021-21574 7.2 HIGH Dell BIOSConnect feature 缓冲区错误漏洞
CVE-2021-21571 5.9 MEDIUM Dell BIOSConnect信任管理问题漏洞

IV. Related Vulnerabilities

Same product: BIOSConnect
Same vendor: Dell
Same weakness: CWE-121

V. Comments for CVE-2021-21573

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