CVE-2021-33595 : What You Need to Know

A vulnerability was found in F-Secure Safe Browser for iOS that allows remote attackers to spoof the address bar, making users believe they are on a legitimate website.

Understanding CVE-2021-33595

This CVE identifies an address bar spoofing vulnerability in Safe Browser for iOS that can be exploited by remote attackers.

What is CVE-2021-33595?

The vulnerability in F-Secure Safe Browser for iOS allows attackers to display a legitimate URL in the address bar while loading content from a different domain, leading users to believe they are on a trusted site.

The Impact of CVE-2021-33595

With this vulnerability, a remote attacker can conduct address bar spoofing attacks, potentially tricking users into providing sensitive information.

Technical Details of CVE-2021-33595

This section provides details about the vulnerability and the systems affected by CVE-2021-33595.

Vulnerability Description

The vulnerability allows attackers to show a legitimate URL in the address bar while loading content from an untrusted source, enabling address bar spoofing attacks.

Affected Systems and Versions

Platforms: iOS
Product: F-Secure Mobile Security
Vendor: F-Secure
Versions Affected: Less than 18.3x*, Version 18.4x (custom)

Exploitation Mechanism

The vulnerability is triggered when the Safe Browser for iOS loads content from a different domain while displaying a legitimate URL in the address bar, creating a false sense of security for users.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-33595, users and organizations should take immediate and long-term security measures.

Immediate Steps to Take

Users should upgrade to version 18.4.x or newer from the App Store to eliminate the address bar spoofing vulnerability.

Long-Term Security Practices

Maintain awareness of potential spoofing attacks and exercise caution while browsing the internet to avoid falling victim to such exploits.

Patching and Updates

Regularly apply security patches and updates provided by F-Secure to address vulnerabilities and enhance the security of Safe Browser for iOS.