CVE Vulnerabilities

CVE-2021-22488

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

Published: Oct 28, 2021 | Modified: Jul 12, 2022
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

There is an Unauthorized file access vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability by modifying soft links may tamper with the files restored from backups.

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
Magic_ui Huawei 3.1.1 3.1.1
Emui Huawei 10.1.1 10.1.1
Magic_ui Huawei 4.0.0 4.0.0
Emui Huawei 11.0.0 11.0.0

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