CVE-2021-33596

Fake Apple login prompt in F-Secure SAFE browser for iOS

Severity Score

4.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Showing the legitimate URL in the address bar while loading the content from other domain. This makes the user believe that the content is served by a legit domain. Exploiting the vulnerability requires the user to click on a specially crafted, seemingly legitimate URL containing an embedded malicious redirect while using F-Secure Safe Browser for iOS.

Mostrar la URL legítima en la barra de direcciones mientras se carga el contenido de otro dominio. Esto hace creer al usuario que el contenido es servido por un dominio legítimo. Una explotación de la vulnerabilidad requiere al usuario hacer clic en una URL especialmente diseñada, aparentemente legítima, conteniendo una redirección maliciosa insertada mientras se usa F-Secure Safe Browser for iOS

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-27 CVE Reserved
2021-08-05 CVE Published
2024-02-08 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-1021: Improper Restriction of Rendered UI Layers or Frames

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame	2021-08-12
https://www.f-secure.com/en/business/support-and-downloads/security-advisories	2021-08-12
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33596	2021-08-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
F-secure Search vendor "F-secure"		Safe Search vendor "F-secure" for product "Safe"				< 18.4.272901 Search vendor "F-secure" for product "Safe" and version " < 18.4.272901"		iphone_os		Affected