Description
The PayPal merchant SDK does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
References
- 56445 vdb-entry
- paypal-sdk-spoofing(79913) vdb-entry
- http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
- 51184 third-party-advisory
- https://github.com/paypal/SDKs/commit/5f2d6dd77fb4211dcde34e36f1864234526c5d64