bpo-35746: Fix segfault in ssl's cert parser (GH-11569)


Fix a NULL pointer deref in ssl module. The cert parser did not handle CRL
distribution points with empty DP or URI correctly. A malicious or buggy
certificate can result into segfault.

Signed-off-by: Christian Heimes <christian@python.org>

https://bugs.python.org/issue35746
(cherry picked from commit a37f52436f9aa4b9292878b72f3ff1480e2606c3)

Co-authored-by: Christian Heimes <christian@python.org>
4 files changed