CVE-2021-27189 : Exploit Details and Defense Strategies

The CIRA Canadian Shield app before version 4.0.13 for iOS is impacted by a vulnerability that leads to the lack of SSL Certificate Validation.

Understanding CVE-2021-27189

This CVE identifier is associated with a security flaw found in the CIRA Canadian Shield app for iOS, which could result in potential security risks due to inadequate SSL Certificate Validation.

What is CVE-2021-27189?

The vulnerability in the CIRA Canadian Shield app before version 4.0.13 for iOS arises from the absence of proper SSL Certificate Validation, making it susceptible to Man-In-The-Middle attacks.

The Impact of CVE-2021-27189

The lack of SSL Certificate Validation in the affected app version could allow threat actors to intercept and modify communications between the app and servers, compromising the confidentiality and integrity of data transmitted.

Technical Details of CVE-2021-27189

The technical details of this CVE include:

Vulnerability Description

The vulnerability stems from the failure to validate SSL certificates, exposing the app to interception attacks.

Affected Systems and Versions

Product: CIRA Canadian Shield app
Vendor: N/A
Versions Affected: Before 4.0.13

Exploitation Mechanism

Attackers can exploit this flaw by intercepting the communication between the app and servers to eavesdrop, manipulate, or inject malicious content.

Mitigation and Prevention

To address CVE-2021-27189, consider the following:

Immediate Steps to Take

Users should update the CIRA Canadian Shield app to version 4.0.13 or newer to mitigate the SSL Certificate Validation issue.
Avoid using unsecured networks while accessing sensitive information through the app.

Long-Term Security Practices

Implement HTTPS and ensure SSL/TLS configurations are correctly set up to prevent Man-In-The-Middle attacks.
Regularly monitor and update SSL certificates to maintain a secure communication environment.

Patching and Updates

Stay informed about security updates released by the app vendor and promptly apply patches to address known vulnerabilities.