Two universal XSS vulnerabilities in Mozilla Focus for iOS

Published: 2024-02-23

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2024-26284 CVE-2024-1563
CWE-ID	CWE-79
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Focus for iOS Client/Desktop applications / Web browsers
Vendor	Mozilla

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Universal cross-site scripting

EUVDB-ID: #VU86743

Risk: Medium

CVSSv4.0: 1.2 [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:Green]

CVE-ID: CVE-2024-26284

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

Exploit availability: No

Description

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 processing HTTP 302 redirects. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Focus for iOS: 2.0 - 122.1

CPE2.3

External links

https://bugzilla.mozilla.org/show_bug.cgi?id=1860075
https://www.mozilla.org/security/advisories/mfsa2024-10/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Universal cross-site scripting

EUVDB-ID: #VU86742