CVE Vulnerabilities

CVE-2021-39967

Incorrect Default Permissions

Published: Jan 03, 2022 | Modified: Jan 13, 2022
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu

There is a Vulnerability of obtaining broadcast information improperly due to improper broadcast permission settings in Smartphones.Successful exploitation of this vulnerability may affect service confidentiality.

Weakness

During installation, installed file permissions are set to allow anyone to modify those files.

Affected Software

Name Vendor Start Version End Version
Emui Huawei 9.1.0 (including) 9.1.0 (including)
Emui Huawei 9.1.1 (including) 9.1.1 (including)
Emui Huawei 10.0.0 (including) 10.0.0 (including)
Emui Huawei 10.1.0 (including) 10.1.0 (including)
Emui Huawei 10.1.1 (including) 10.1.1 (including)
Harmonyos Huawei * 2.0 (excluding)
Magic_ui Huawei 2.1.1 (including) 2.1.1 (including)
Magic_ui Huawei 3.0.0 (including) 3.0.0 (including)
Magic_ui Huawei 3.1.0 (including) 3.1.0 (including)

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References