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CVE-2021-44751— F-Secure SAFE Browser vulnerable to USSD attacks

Quick assessment

Affected
F-Secure F-Secure SAFE Browser for Android Version 18.5 & below
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F-secure F-Secure SAFE是芬兰F-Secure（F-secure）公司的一套杀毒软件。 F-Secure SAFE browser存在安全漏洞，该漏洞源于带有 JavaScript 或 iFrame 中的 USSD 代码的恶意制作的网站可以从 F-Secure 浏览器触发拨号应用程序，攻击者可以利用该应用程序发送不需要的 USSD 消息或执行不需要的呼叫。

CVSS 4.3 · Medium EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process
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I. Basic Information for CVE-2021-44751

Vulnerability Information
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Vulnerability Title
F-Secure SAFE Browser vulnerable to USSD attacks
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability affecting F-Secure SAFE browser was discovered. A maliciously crafted website attached with USSD code in JavaScript or iFrame can trigger dialer application from F-Secure browser which can be exploited by an attacker to send unwanted USSD messages or perform unwanted calls. In most modern Android OS, dialer application will require user interaction, however, some older Android OS may not need user interaction.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
F-secure F-Secure SAFE 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F-secure F-Secure SAFE是芬兰F-Secure（F-secure）公司的一套杀毒软件。 F-Secure SAFE browser存在安全漏洞，该漏洞源于带有 JavaScript 或 iFrame 中的 USSD 代码的恶意制作的网站可以从 F-Secure 浏览器触发拨号应用程序，攻击者可以利用该应用程序发送不需要的 USSD 消息或执行不需要的呼叫。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F-Secure F-Secure SAFE Browser for Android Version 18.5 & below 18.5 ~ 18.6 -

II. Public POCs for CVE-2021-44751

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III. Intelligence Information for CVE-2021-44751

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Other References for CVE-2021-44751 (1)

IV. Related Vulnerabilities

Same vendor: F-Secure

V. Comments for CVE-2021-44751

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