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CVE-2021-23892

Quick assessment

Affected
McAfee,LLC McAfee Endpoint Security (ENS) for Linux
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 Endpoint Security（ENS）是美国迈克菲（McAfee）公司的一套提供智能协作和先进的威胁防御的框架。该框架支持对实时通信的整个威胁防御生命周期进行控制并进行可操作的威胁取证等。 McAfee Endpoint Security 存在后置链接漏洞。通过在Linux ENSL TP/FW安装过程中利用对使用时间的检查竞争条件，本地用户可以执行特权提升攻击，以获取管理员特权。

CVSS 8.2 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-23892

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
By exploiting a time of check to time of use (TOCTOU) race condition during the Endpoint Security for Linux Threat Prevention and Firewall (ENSL TP/FW) installation process, a local user can perform a privilege escalation attack to obtain administrator privileges for the purpose of executing arbitrary code through insecure use of predictable temporary file locations.
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
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Mcafee McAfee Security 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
McAfee Endpoint Security（ENS）是美国迈克菲（McAfee）公司的一套提供智能协作和先进的威胁防御的框架。该框架支持对实时通信的整个威胁防御生命周期进行控制并进行可操作的威胁取证等。 McAfee Endpoint Security 存在后置链接漏洞。通过在Linux ENSL TP/FW安装过程中利用对使用时间的检查竞争条件，本地用户可以执行特权提升攻击，以获取管理员特权。
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 Endpoint Security (ENS) for Linux unspecified ~ 10.7.5 -

II. Public POCs for CVE-2021-23892

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III. Intelligence Information for CVE-2021-23892

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Other References for CVE-2021-23892 (1)

Same Patch Batch · McAfee,LLC · 2021-05-12 · 3 CVEs total

CVE-2021-23872 7.8 HIGH Privilege Escalation vulnerability in McAfee Total Protection (MTP)
CVE-2021-23891 7.8 HIGH Privilege Escalation vulnerability in McAfee Total Protection (MTP)

IV. Related Vulnerabilities

Same vendor: McAfee,LLC
Same weakness: CWE-59

V. Comments for CVE-2021-23892

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