- Update to 3.6.15:
- bpo-43124: Made the internal putcmd function in smtplib
sanitize input for presence of \r and \n characters to avoid
(unlikely) command injection. Library
- bpo-45001: Made email date parsing more robust against
malformed input, namely a whitespace-only Date: header. Patch
by Wouter Bolsterlee. Tests
- bpo-38965: Fix test_faulthandler on GCC 10. Use the
“volatile” keyword in faulthandler._stack_overflow() to
prevent tail call optimization on any compiler, rather than
relying on compiler specific pragma.
- Remove upstreamed patches:
- faulthandler_stack_overflow_on_GCC10.patch

- bpo-44022 (bsc#1189241, CVE-2021-3737): mod:http.client now
avoids infinitely reading potential HTTP headers after
a 100 Continue status response from the server.
- bpo-42988 (CVE-2021-3426, bsc#1183374): Remove the getfile feature
of the pydoc module which could be abused to read arbitrary files
on the disk (directory traversal vulnerability). Moreover, even
- bpo-43075 (CVE-2021-3733, bsc#1189287): Fix Regular Expression
Denial of Service (ReDoS) vulnerability in
urllib.request.AbstractBasicAuthHandler. The ReDoS-vulnerable
regex has quadratic worst-case complexity and it allows cause
a denial of service when identifying crafted invalid RFCs. This
ReDoS issue is on the client side and needs remote attackers to
control the HTTP server.