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CVE-2021-21557

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 Server 存在安全漏洞，攻击者可能会利用这个漏洞，导致在系统管理模式下拒绝服务、任意代码执行或信息公开。

CVSS 8.1 · High EPSS 0.35% · P28
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I. Basic Information for CVE-2021-21557

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. 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 System Management Mode.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Dell PowerEdge Server 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 Server 存在安全漏洞，攻击者可能会利用这个漏洞，导致在系统管理模式下拒绝服务、任意代码执行或信息公开。
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-2021-21557

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III. Intelligence Information for CVE-2021-21557

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Other References for CVE-2021-21557 (1)

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

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
CVE-2021-21555 6.1 MEDIUM Dell PowerEdge 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: PowerEdge BIOS Intel 15G
Same vendor: Dell
Same weakness: CWE-20

V. Comments for CVE-2021-21557

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