CVE Vulnerabilities

CVE-2021-31843

Improper Link Resolution Before File Access ('Link Following')

Published: Sep 17, 2021 | Modified: Nov 07, 2023
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
4.6 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

Improper privileges management vulnerability in McAfee Endpoint Security (ENS) Windows prior to 10.7.0 September 2021 Update allows local users to access files which they would otherwise not have access to via manipulating junction links to redirect McAfee folder operations to an unintended location.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Endpoint_security Mcafee * 10.7.0 (excluding)
Endpoint_security Mcafee 10.7.0 (including) 10.7.0 (including)
Endpoint_security Mcafee 10.7.0-april_2020 (including) 10.7.0-april_2020 (including)
Endpoint_security Mcafee 10.7.0-april_2021 (including) 10.7.0-april_2021 (including)
Endpoint_security Mcafee 10.7.0-february_2020 (including) 10.7.0-february_2020 (including)
Endpoint_security Mcafee 10.7.0-february_2021 (including) 10.7.0-february_2021 (including)
Endpoint_security Mcafee 10.7.0-july_2020 (including) 10.7.0-july_2020 (including)
Endpoint_security Mcafee 10.7.0-june_2021 (including) 10.7.0-june_2021 (including)
Endpoint_security Mcafee 10.7.0-november_2020 (including) 10.7.0-november_2020 (including)
Endpoint_security Mcafee 10.7.0-september_2020 (including) 10.7.0-september_2020 (including)

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References