CVE-2020-5523

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.
Severity
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Atk. Vector
NETWORK
Atk. Complexity
HIGH
Priv. Required
NONE
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 58%
Common Weakness Enumeration
References
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