#VU97433 Improper Authorization in Handler for Custom URL Scheme in @cosme App for Android and @cosme App for iOS - CVE-2024-45203

Vulnerability identifier: #VU97433

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-45203

CWE-ID: CWE-939

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
@cosme App for Android
Mobile applications / Apps for mobile phones
@cosme App for iOS
Mobile applications / Apps for mobile phones

Vendor: istyle

Description

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

The vulnerability exists due to the affected application fails to restrict custom URL schemes properly. A remote attacker can trick a victim to access an arbitrary website.

Mitigation
Install update from vendor's website.

Vulnerable software versions

@cosme App for Android: before 5.69.0

@cosme App for iOS: before 6.74.0

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External links
https://jvn.jp/en/jp/JVN81570776/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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