Vulnerability Details : 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.
Exploit prediction scoring system (EPSS) score for CVE-2020-5523
Probability of exploitation activity in the next 30 days: 0.15%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 51 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-5523
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST |
|
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2020-5523
-
The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-5523
-
https://www.hokugin.co.jp/info/archives/personal/2020/1913.html
『北陸銀行ポータルアプリ』におけるSSL通信時の脆弱性の修正に関するお知らせ｜お知らせ｜北陸銀行Third Party Advisory
-
http://jvn.jp/en/jp/JVN28845872/index.html
JVN#28845872: Android App "MyPallete" vulnerable to improper server certificate verificationThird Party Advisory
-
https://www.tohoku-bank.co.jp/news/topics/200128_applissl.html
とうぎんアプリにおけるSSL通信時の複数の脆弱性に関するお知らせ｜東北銀行Third Party Advisory
-
http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html
【どこでもバンク】 あなたの新しいネットバンキング | HOMEThird Party Advisory
-
https://www.shikokubank.co.jp/info/apps20200128.html
四国銀行アプリにおけるSSL通信時の複数の脆弱性に関するお知らせ | 四国銀行Third Party Advisory
-
https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf
Third Party Advisory
-
https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf
Third Party Advisory
-
https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf
Third Party Advisory
-
https://www.naganobank.co.jp/soshiki/2/app-ssl.html
ながぎんアプリにおけるSSL通信時の複数の脆弱性に関するお知らせ - 長野銀行Third Party Advisory
-
https://www.sihd-bk.jp/common_v2/pdf/20200127.pdf
Third Party Advisory
Products affected by CVE-2020-5523
- cpe:2.3:a:nttdata:mypallete:-:*:*:*:*:android:*:*
- cpe:2.3:a:77bank:77_bank:*:*:*:*:*:android:*:*
- cpe:2.3:a:ashikagabank:ashigin:*:*:*:*:*:android:*:*
- cpe:2.3:a:hokkaidobank:dogin:*:*:*:*:*:android:*:*
- cpe:2.3:a:hokugin:hokuriku_bank_portal:*:*:*:*:*:android:*:*
- cpe:2.3:a:naganobank:nagagin:*:*:*:*:*:android:*:*
- cpe:2.3:a:shikokubank:shikoku_bank:*:*:*:*:*:android:*:*
- cpe:2.3:a:sihd-bk:ikeda_senshu_bank:*:*:*:*:*:android:*:*
- cpe:2.3:a:tohoku-bank:tougin:*:*:*:*:*:android:*:*