CVE-2020-1891 Explained : Impact and Mitigation

A user controlled parameter used in video calls in WhatsApp for Android, WhatsApp Business for Android, WhatsApp for iPhone, and WhatsApp Business for iPhone could have allowed an out-of-bounds write on 32-bit devices.

Understanding CVE-2020-1891

This CVE identifies a security vulnerability impacting WhatsApp mobile applications.

What is CVE-2020-1891?

The vulnerability in user-controlled video call parameters could lead to out-of-bounds writes on specific devices.

The Impact of CVE-2020-1891

The vulnerability could be exploited to execute malicious code or cause system crashes on affected devices.

Technical Details of CVE-2020-1891

This section provides in-depth technical insights into the CVE.

Vulnerability Description

The issue arises due to a user-controlled parameter in video calls, leading to out-of-bounds writes on 32-bit devices.

Affected Systems and Versions

WhatsApp Android versions prior to 2.20.17
WhatsApp Business for Android versions prior to 2.20.7
WhatsApp iPhone versions prior to 2.20.20
WhatsApp Business for iPhone versions prior to 2.20.20

Exploitation Mechanism

Attackers could exploit this vulnerability to potentially gain unauthorized access or disrupt the targeted system.

Mitigation and Prevention

Protecting systems from CVE-2020-1891 is crucial to maintaining security.

Immediate Steps to Take

Update WhatsApp applications to the latest versions available.
Exercise caution while engaging in video calls to mitigate risks.

Long-Term Security Practices

Educate users on safe usage practices and potential risks of video calls.
Implement comprehensive security measures to detect and prevent similar vulnerabilities.

Patching and Updates

Regularly check for and apply security patches and updates provided by WhatsApp to address known vulnerabilities.