CVE-2021-0956 Explained : Impact and Mitigation

This CVE-2021-0956 article provides details about a vulnerability in Android that could result in an elevation of privilege without the need for user interaction.

Understanding CVE-2021-0956

This section delves into what CVE-2021-0956 entails, its impact, technical details, and methods for mitigation.

What is CVE-2021-0956?

The vulnerability occurs in NfcTag::discoverTechnologies of NfcTag.cpp, potentially leading to an out-of-bounds write because of an incorrect bounds check. Exploitation could afford remote privilege escalation without additional system execution privileges.

The Impact of CVE-2021-0956

The issue, identified by Android ID A-189942532, affects Android versions 11 and 12, opening the door to remote attackers gaining escalated privileges without requiring user interaction.

Technical Details of CVE-2021-0956

Learn more about the specifics of the vulnerability.

Vulnerability Description

The vulnerability stems from an incorrect bounds check in NfcTag::discoverTechnologies, enabling potential out-of-bounds writes, leading to a significant security risk.

Affected Systems and Versions

Android versions 11 and 12 are susceptible to this security flaw, marked as 'affected' as per the CVE details.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely, targeting the NfcTag::discoverTechnologies function, allowing for unauthorized privilege escalation.

Mitigation and Prevention

Here's how you can address this CVE and prevent potential exploitation.

Immediate Steps to Take

Ensure systems running Android 11 and 12 are monitored for any signs of unauthorized access or activity to mitigate the risk of privilege escalation.

Long-Term Security Practices

Implement strict security protocols and ongoing monitoring procedures to detect and prevent similar vulnerabilities in the future.

Patching and Updates

Stay updated on security bulletins and patches released by Android to address CVE-2021-0956 and other potential vulnerabilities.