SB2024012605 - Multiple vulnerabilities in Mozilla Focus for iOS

Description

This security bulletin contains information about 2 vulnerabilities.

1) Security features bypass (CVE-ID: CVE-2024-0605)

CWE-ID: CWE-254 - Security Features

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a race condition in javascript: URI with a setTimeout running on top origin sites. A remote attacker can  execute arbitrary scripts on top origin sites in urlbar and compromise any loaded page.

2) Universal cross-site scripting (CVE-ID: CVE-2024-0606)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Amber

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when using window.open() method. A remote attacker can execute arbitrary HTML and script code in user's browser in context of any website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1855575
• https://www.mozilla.org/security/advisories/mfsa2024-03/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1855030