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[nginx-announce] nginx-1.21.0

Posted by Maxim Dounin 
Maxim Dounin
[nginx-announce] nginx-1.21.0
May 25, 2021 11:38AM
Changes with nginx 1.21.0 25 May 2021

*) Security: 1-byte memory overwrite might occur during DNS server
response processing if the "resolver" directive was used, allowing an
attacker who is able to forge UDP packets from the DNS server to
cause worker process crash or, potentially, arbitrary code execution

*) Feature: variables support in the "proxy_ssl_certificate",
"proxy_ssl_certificate_key" "grpc_ssl_certificate",
"grpc_ssl_certificate_key", "uwsgi_ssl_certificate", and
"uwsgi_ssl_certificate_key" directives.

*) Feature: the "max_errors" directive in the mail proxy module.

*) Feature: the mail proxy module supports POP3 and IMAP pipelining.

*) Feature: the "fastopen" parameter of the "listen" directive in the
stream module.
Thanks to Anbang Wen.

*) Bugfix: special characters were not escaped during automatic redirect
with appended trailing slash.

*) Bugfix: connections with clients in the mail proxy module might be
closed unexpectedly when using SMTP pipelining.

Maxim Dounin
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