Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2021-40049

Incorrect Default Permissions

Published: Mar 10, 2022 | Modified: Nov 21, 2024
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
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-40049
CWEhttps://cwe.mitre.org/data/definitions/276.html

There is a permission control vulnerability in the PMS module. Successful exploitation of this vulnerability can lead to sensitive system information being obtained without authorization.

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 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)
Emui Huawei 11.0.0 (including) 11.0.0 (including)
Emui Huawei 11.0.1 (including) 11.0.1 (including)
Emui Huawei 12.0.0 (including) 12.0.0 (including)
Harmonyos Huawei 2.0 (including) 2.0 (including)
Magic_ui Huawei 3.1.0 (including) 3.1.0 (including)
Magic_ui Huawei 3.1.1 (including) 3.1.1 (including)
Magic_ui Huawei 4.0.0 (including) 4.0.0 (including)
Pms Ubuntu bionic *
Pms Ubuntu impish *
Pms Ubuntu kinetic *
Pms Ubuntu mantic *
Pms Ubuntu trusty *
Pms Ubuntu xenial *

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

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