Improper Authorization in Handler for Custom URL Scheme in e-Gov Client Application

1) Improper Authorization in Handler for Custom URL Scheme

EUVDB-ID: #VU81694

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-44689

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 fails to restrict custom URL schemes properly. A remote attacker can trick a victim to access an arbitrary website.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

e-Gov Client Application for Windows: before 2.1.1.0

e-Gov Client Application for macOS: before 1.1.1.0

External links

http://jvn.jp/en/jp/JVN15808274/index.html
http://shinsei.e-gov.go.jp/contents/news/2023-03-12t1022040900_1318.html

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.