CVE-2020-5523 Information

Description

Android App ‘MyPallete’ and some of the Android banking applications based on ‘MyPallete’ do not verify X.509 certificates from servers and also do not properly validate certificates with host-mismatch which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Reference

http://jvn.jp/en/jp/JVN28845872/index.html http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf https://www.hokugin.co.jp/info/archives/personal/2020/1913.html https://www.naganobank.co.jp/soshiki/2/app-ssl.html https://www.shikokubank.co.jp/info/apps20200128.html https://www.sihd-bk.jp/common_v2/pdf/20200127.pdf https://www.tohoku-bank.co.jp/news/topics/200128_applissl.html

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.4