Description
pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.
Problem types
CWE-636: Not Failing Securely ('Failing Open')
Product status
References
github.com/...penssl/security/advisories/GHSA-vp96-hxj8-p424
github.com/...ommit/d41a814759a9fb49584ca8ab3f7295de49a85aa0
github.com/...c4e364c59930e53a270116249581eaa3/CHANGELOG.rst