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CVE-2021-31847— Improper privilege management in repair process of MA for Windows

Quick assessment

Affected
McAfee,LLC McAfee Agent for Windows
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.

Mcafee McAfee Agent（MA）是美国迈克菲（Mcafee）公司的一套提供了ePolicy Orchestrator（杀毒软件管理平台）与被管理产品之间的安全通信的客户端组件。 McAfee Agent for Windows 5.7.4之前版本的repair进程存在安全漏洞，该漏洞源于没有正确保护修复过程中使用的临时目录，也没有检查DLL签名。攻击者可利用该漏洞通过未签名的DLL执行DLL预加载攻击，导致特权的提升和执行任意代码。

CVSS 8.2 · High EPSS 0.40% · P32
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I. Basic Information for CVE-2021-31847

Vulnerability Information
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Vulnerability Title
Improper privilege management in repair process of MA for Windows
Source: CVE Program / CVE List V5
Vulnerability Description
Improper access control vulnerability in the repair process for McAfee Agent for Windows prior to 5.7.4 could allow a local attacker to perform a DLL preloading attack using unsigned DLLs. This would result in elevation of privileges and the ability to execute arbitrary code as the system user, through not correctly protecting a temporary directory used in the repair process and not checking the DLL signature.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mcafee McAfee Agent 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mcafee McAfee Agent（MA）是美国迈克菲（Mcafee）公司的一套提供了ePolicy Orchestrator（杀毒软件管理平台）与被管理产品之间的安全通信的客户端组件。 McAfee Agent for Windows 5.7.4之前版本的repair进程存在安全漏洞，该漏洞源于没有正确保护修复过程中使用的临时目录，也没有检查DLL签名。攻击者可利用该漏洞通过未签名的DLL执行DLL预加载攻击，导致特权的提升和执行任意代码。
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
McAfee,LLC McAfee Agent for Windows unspecified ~ 5.7.4 -

II. Public POCs for CVE-2021-31847

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III. Intelligence Information for CVE-2021-31847

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Vendor Advisories for CVE-2021-31847 (1)

Other References for CVE-2021-31847 (1)

Same Patch Batch · McAfee,LLC · 2021-09-22 · 3 CVEs total

CVE-2021-31841 8.2 HIGH DLL side loading vulnerability in MA for Windows
CVE-2021-31836 5.6 MEDIUM Improper Privilege Management in MA for Windows

IV. Related Vulnerabilities

Same product: McAfee Agent for Windows
Same vendor: McAfee,LLC
Same weakness: CWE-269

V. Comments for CVE-2021-31847

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