A vulnerability was found in Tu Yafeng Via Browser up to 5.9.0 on Android. It has been rated as problematic. This issue affects some unknown processing of the component Javascript Bridge. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The weakness was presented by Finn Westendorf with modzero AG as MZ-25-01 as confirmed advisory (Website). It is possible to read the advisory at modzero.com. The identification of this vulnerability is CVE-2024-9285. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. The advisory points out:

The Via Browser exposes certain API functions through JavaScript for websites to use. One of them is called via.searchText. If the function gets passed an URL, it opens it.

By repeatedly calling this function with a javascript:-URL and then redirecting to another website, one can cause a state where the JavaScript payload is executed after the redirection already took place.

A public exploit has been developed by Finn Westendorf. The exploit is available at modzero.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 196 days. During that time the estimated underground price was around . The code used by the exploit is:

setInterval(() =>
via.searchText("javascript:document.domain.includes('modzero') ? alert(document.domain) : null"), 1)
window.location.href = "https://modzero.com";

Applying a patch is able to eliminate this problem.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Android App Software

Vendor

• Tu Yafeng

Name

• Via Browser

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9.0

CPE 2.3info

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• 🔒
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CPE 2.2info

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• 🔒
• 🔒

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