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CVE-2021-40835

MEDIUM
Published 2021-12-16T10:58:55
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Expert Analysis

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CVSS Score

V3.1
4.6
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.434
Higher than 43.4% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
LOW
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

F-Secure

F-Secure Mobile Security

Affected Versions:

18.3

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-75cm-2vvh-47g6

Advisory Details

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.

CVSS Scoring

CVSS Score

5.0

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-40835
WEB https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
WEB https://www.f-secure.com/en/business/support-and-downloads/security-advisories

Advisory provided by GitHub Security Advisory Database. Published: December 17, 2021, Modified: January 4, 2022

References

https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
https://www.f-secure.com/en/business/support-and-downloads/security-advisories
Published: 2021-12-16T10:58:55
Last Modified: 2024-08-04T02:51:07.421Z
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