CVE-2021-39796 Explained : Impact and Mitigation
Discover details about CVE-2021-39796 affecting Android systems through tapjacking/overlay attacks, leading to privilege escalation. Learn about impacts, mitigation, and prevention measures.
This CVE-2021-39796 article provides an overview of a vulnerability found in Android systems related to potential tapjacking/overlay attacks and privilege escalation.
Understanding CVE-2021-39796
CVE-2021-39796 is a vulnerability discovered in Android systems regarding a possible trick to install harmful apps through tapjacking/overlay attacks. This exploit can lead to a local escalation of privilege, requiring User execution privileges for exploitation.
What is CVE-2021-39796?
- The vulnerability exists in HarmfulAppWarningActivity of HarmfulAppWarningActivity.java in Android systems.
- It allows attackers to deceive users into installing harmful applications through tapjacking/overlay methods.
The Impact of CVE-2021-39796
This vulnerability could result in a local escalation of privilege within the Android system, with User interaction required for successful exploitation.
Technical Details of CVE-2021-39796
CVE-2021-39796 reveals specific technical aspects related to the vulnerability in Android systems.
Vulnerability Description
- Location: HarmfulAppWarningActivity of HarmfulAppWarningActivity.java
- Exploit: Tricking users into installing harmful apps via tapjacking/overlay attacks
Affected Systems and Versions
- Product: Android
- Versions Affected: Android-10, Android-11, Android-12, Android-12L
Exploitation Mechanism
- Attackers exploit tapjacking/overlay techniques to deceive users into installing malicious apps.
Mitigation and Prevention
This section provides guidance on mitigating the risks associated with CVE-2021-39796.
Immediate Steps to Take
- Implement security patches provided by Android to address this vulnerability.
- Educate users about the risks of tapjacking attacks and encourage caution when installing apps.
Long-Term Security Practices
- Regularly update the Android system and apps to prevent exploitation of known vulnerabilities.
- Use reputable app sources and exercise caution when granting permissions to applications.
Patching and Updates
- Stay informed about security bulletins and updates from Android to address CVE-2021-39796.