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CVE-2021-40835

4.6 · MEDIUM

An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS.

Published Dec 16, 2021EPSS 0.73%

Overview

CVE-2021-40835 is a medium-severity vulnerability. It was published on December 16, 2021 and has a CVSS 3.1 base score of 4.6 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS. When user clicks on a specially crafted a malicious URL, if user does not carefully pay attention to url, user may be tricked to think content may be coming from a valid domain, while it comes from another. This is performed by using a very long username part of the url so that user cannot see the domain name. A remote attacker can leverage this to perform url address bar spoofing attack. The fix is, browser no longer shows the user name part in address bar.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisoriesRefwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisories

How CyberStrike helps

Frequently asked questions

What is CVE-2021-40835?

CVE-2021-40835 is a medium-severity vulnerability. It was published on December 16, 2021 and has a CVSS 3.1 base score of 4.6 (MEDIUM).

How severe is CVE-2021-40835?

This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-40835?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-40835?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-40835 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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