CVE-2021-39629 : Exploit Details and Defense Strategies
Learn about CVE-2021-39629, a critical Android vulnerability affecting versions 9 to 12, enabling privilege escalation. Find mitigation steps and system protection measures.
This CVE-2021-39629 article provides insights into a vulnerability affecting Android versions 9 to 12, potentially leading to privilege escalation.
Understanding CVE-2021-39629
CVE-2021-39629 involves a use-after-free vulnerability in phTmlNfc_Init and phTmlNfc_CleanUp of phTmlNfc.cc, posing a local privilege escalation risk on Android devices.
What is CVE-2021-39629?
The vulnerability presents a risk of local privilege escalation on Android devices without requiring user interaction, affecting versions 9 to 12.
The Impact of CVE-2021-39629
The potential exploitation of this vulnerability could lead to an elevation of privilege on the affected Android systems, posing a security risk.
Technical Details of CVE-2021-39629
This section delves into the specifics of the vulnerability to provide a deeper understanding.
Vulnerability Description
The use-after-free vulnerability in phTmlNfc_Init and phTmlNfc_CleanUp of phTmlNfc.cc can result in privilege escalation without additional execution privileges.
Affected Systems and Versions
- Product: Android
- Versions Affected: Android-9, Android-10, Android-11, Android-12
Exploitation Mechanism
The vulnerability manifests due to a race condition, potentially enabling attackers to exploit the flaw for privilege escalation.
Mitigation and Prevention
Understanding steps to mitigate and prevent exploitation of this vulnerability is crucial.
Immediate Steps to Take
- Apply security patches promptly to the affected Android devices.
- Monitor security bulletins from Android for updates on this vulnerability.
Long-Term Security Practices
- Employ defense-in-depth strategies to enhance overall system security.
- Regularly update and patch Android devices to address known vulnerabilities.
- Conduct security assessments and audits periodically to identify and address potential risks.
- Implement secure coding practices to minimize the likelihood of similar vulnerabilities.
Patching and Updates
Stay vigilant for security updates from Android addressing CVE-2021-39629 to ensure the ongoing protection of Android devices.