Improper Authorization in Handler for Custom URL Scheme in Skylark App

1) Improper Authorization in Handler for Custom URL Scheme

EUVDB-ID: #VU80012

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-40530

CWE-ID: CWE-939 - Improper Authorization in Handler for Custom URL Scheme

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected application does not restrict access to the function properly. A remote attacker can trick a victim to access an arbitrary website.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Skylark App for Android: 6.2.13

Skylark App for iOS: 6.2.13

External links

http://play.google.com/store/apps/details?id=jp.co.skylark.app.gusto
http://apps.apple.com/jp/app/%E3%81%99%E3%81%8B%E3%81%84%E3%82%89%E3%83%BC%E3%81%8F%E3%82%A2%E3%83%97%E3%83%AA/id906930478
http://jvn.jp/en/jp/JVN03447226/

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 perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

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