CVE-2021-46840 : What You Need to Know
Learn about CVE-2021-46840, an out-of-bounds access vulnerability in the HW_KEYMASTER module affecting HarmonyOS and EMUI versions. Find mitigation steps and system updates here.
CVE-2021-46840 is an out-of-bounds access vulnerability in the HW_KEYMASTER module, potentially affecting HarmonyOS and EMUI versions. This could lead to unauthorized data manipulation and out-of-bounds access.
Understanding CVE-2021-46840
The vulnerability presents a risk of unauthorized data construction and manipulation, resulting in out-of-bounds access.
What is CVE-2021-46840?
The HW_KEYMASTER module is susceptible to an out-of-bounds access vulnerability during parameter set verification. Exploitation of this flaw may allow attackers to maliciously construct data, leading to unauthorized access beyond the intended boundaries.
The Impact of CVE-2021-46840
If successfully exploited, this vulnerability could enable threat actors to create and manipulate data in a way that breaches system boundaries, potentially leading to unauthorized access and data compromise.
Technical Details of CVE-2021-46840
This section provides insight into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability lies in the HW_KEYMASTER module, allowing for out-of-bounds access during parameter set verification.
Affected Systems and Versions
The following systems and versions are known to be affected:
- Huawei HarmonyOS 2.0
- Huawei EMUI 12.0.0
- Huawei EMUI 11.0.1
Exploitation Mechanism
Malicious actors can exploit this vulnerability by constructing data in a malicious manner, leading to unauthorized access and potentially harmful operations.
Mitigation and Prevention
Protecting systems from CVE-2021-46840 requires immediate action and ongoing security measures.
Immediate Steps to Take
- Apply patches and updates from Huawei promptly.
- Monitor network traffic for any suspicious activities.
- Implement access controls to restrict unauthorized access to sensitive information.
Long-Term Security Practices
- Conduct regular security audits and assessments.
- Educate users and administrators on security best practices.
- Employ intrusion detection and prevention systems.
Patching and Updates
Ensure that all affected systems are updated with the latest patches provided by Huawei to remediate the vulnerability.