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CVE-2021-21555

Quick assessment

Affected
Dell PowerEdge BIOS Intel 15G
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 PowerEdge Server BIOS是戴尔（Dell）的一款系统更新驱动程序。 Dell PowerEdge 存在安全漏洞，攻击者可利用该漏洞导致拒绝服务、任意代码执行或在UEFI或BIOS预引导环境中泄露信息。以下产品及版本受到影响：Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server。

CVSS 6.1 · Medium EPSS 0.31% · P24

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-21555

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a heap-based buffer overflow vulnerability in systems with NVDIMM-N installed. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of Service, arbitrary code execution, or information disclosure in UEFI or BIOS Preboot Environment.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Dell PowerEdge 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dell PowerEdge Server BIOS是戴尔（Dell）的一款系统更新驱动程序。 Dell PowerEdge 存在安全漏洞，攻击者可利用该漏洞导致拒绝服务、任意代码执行或在UEFI或BIOS预引导环境中泄露信息。以下产品及版本受到影响：Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server。
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 PowerEdge BIOS Intel 15G unspecified ~ 2.11.2 -

II. Public POCs for CVE-2021-21555

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III. Intelligence Information for CVE-2021-21555

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Other References for CVE-2021-21555 (1)

Same Patch Batch · Dell · 2021-06-14 · 4 CVEs total

CVE-2021-21557 8.1 HIGH Dell PowerEdge Server 缓冲区错误漏洞
CVE-2021-21556 6.1 MEDIUM Dell PowerEdge 缓冲区错误漏洞
CVE-2021-21554 6.1 MEDIUM Dell PowerEdge 多款产品缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: PowerEdge BIOS Intel 15G
Same vendor: Dell
Same weakness: CWE-122

V. Comments for CVE-2021-21555

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