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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.18% probability · 67th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- 77bank/77 bank · ashikagabank/ashigin · hokkaidobank/dogin · hokugin/hokuriku bank portal · naganobank/nagagin · nttdata/mypallete · shikokubank/shikoku bank · sihd-bk/ikeda senshu bank · tohoku-bank/tougin
- Source
- vultures@jpcert.or.jp
EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://jvn.jp/en/jp/JVN28845872/index.htmlThird Party Advisory
- http://www.dokodemobank.ne.jp/info_20200128_bankingapp.htmlThird Party Advisory
- https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdfThird Party Advisory
- https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdfThird Party Advisory
- https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdfThird Party Advisory
- https://www.hokugin.co.jp/info/archives/personal/2020/1913.htmlThird Party Advisory
- https://www.naganobank.co.jp/soshiki/2/app-ssl.htmlThird Party Advisory
- https://www.shikokubank.co.jp/info/apps20200128.htmlThird Party Advisory
- https://www.sihd-bk.jp/common_v2/pdf/20200127.pdfThird Party Advisory
- https://www.tohoku-bank.co.jp/news/topics/200128_applissl.htmlThird Party Advisory
- http://jvn.jp/en/jp/JVN28845872/index.htmlThird Party Advisory
- http://www.dokodemobank.ne.jp/info_20200128_bankingapp.htmlThird Party Advisory
- https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdfThird Party Advisory
- https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdfThird Party Advisory
- https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdfThird Party Advisory
- https://www.hokugin.co.jp/info/archives/personal/2020/1913.htmlThird Party Advisory
- https://www.naganobank.co.jp/soshiki/2/app-ssl.htmlThird Party Advisory
- https://www.shikokubank.co.jp/info/apps20200128.htmlThird Party Advisory
- https://www.sihd-bk.jp/common_v2/pdf/20200127.pdfThird Party Advisory
- https://www.tohoku-bank.co.jp/news/topics/200128_applissl.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.