[3.13] gh-144833: Fix use-after-free in SSL module when SSL_new() fails (GH-144843) by miss-islington · Pull Request #144859 · python/cpython (original) (raw)
In newPySSLSocket(), when SSL_new() returns NULL, Py_DECREF(self) was called before _setSSLError(get_state_ctx(self), ...), causing a use-after-free. Additionally, get_state_ctx() was called with self (PySSLSocket*) instead of sslctx (PySSLContext*), which is a type confusion bug.
Fix by calling _setSSLError() before Py_DECREF() and using sslctx instead of self for get_state_ctx(). (cherry picked from commit c91638c)
Co-authored-by: Ramin Farajpour Cami ramin.blackhat@gmail.com
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