CVE-2020-5523 Weak cryptography in 'MyPallete' and some of the Android banking applications that use 'MyPallete'
Man-in-the-middle attackers can spoof servers and steal sensitive data from Android banking apps using MyPallete due to improper X.509 certificate validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-5523?
CVE-2020-5523 is a high-severity vulnerability in NTT Data Corporation 'MyPallete' and some of the Android banking applications that use 'MyPallete', published on 28 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2020-5523?
It affects 9 products.
Products include 77bank 77 Bank, Ashikagabank Ashigin, Hokkaidobank Dogin, Hokugin Hokuriku Bank Portal, Naganobank Nagagin, Nttdata Mypallete and 3 more.
How do I fix CVE-2020-5523?
No fix has been published for CVE-2020-5523 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-5523 being exploited?
There is no known exploitation of CVE-2020-5523 in the wild and no public exploit code.
Sources
Also known as GHSA-qrwh-wc9j-x9cj.