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CVE-2021-21301 Explained : Impact and Mitigation

Understand the impact and technical details of CVE-2021-21301, a vulnerability in Wire iOS < 3.75, allowing continued video capture after the camera is disabled.

This article discusses the vulnerability identified as CVE-2021-21301 in the Wire iOS application, affecting versions prior to 3.75.

Understanding CVE-2021-21301

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2021-21301?

The vulnerability in Wire for iOS versions prior to 3.75 allows video capture to continue even after a user disables the camera, leading to a privacy breach during video calls.

The Impact of CVE-2021-21301

The vulnerability poses a privacy risk as video streams persist despite user actions, potentially exposing sensitive information to unintended recipients.

Technical Details of CVE-2021-21301

Here we delve into specific technical details of the CVE.

Vulnerability Description

The flaw in Wire for iOS allows video capture to continue after a user disables the camera, resulting in potential exposure of video content during calls.

Affected Systems and Versions

Wire for iOS versions prior to 3.75 are impacted by this vulnerability, affecting all users engaging in video calls.

Exploitation Mechanism

The vulnerability allows video data to be transmitted to the call stream even when a user believes the camera is disabled, leading to an inadvertent information exposure.

Mitigation and Prevention

This section outlines steps to mitigate the risk and prevent exploitation of the vulnerability.

Immediate Steps to Take

Users of Wire for iOS should update to version 3.75 or later to eliminate the privacy issue associated with the video feed capture.

Long-Term Security Practices

Practicing caution while using video calling features and promptly applying software updates can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for software updates from Wireapp and promptly install them to ensure the security of video communication on iOS devices.

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