Версия

-   Воспроизводится, начиная с версии curl-8.3.0-alt1

Шаги воспроизведения

    apt-get install -y curl apache2-base apache2-cgi-bin apache2-cgi-bin-printenv apache2-cgi-bin-test-cgi apache2-mod_ssl

    a2enmod cgi
    a2ensite default
    a2ensite default_https
    a2enmod ssl
    a2enport https

    cat > /etc/httpd2/conf/sites-enabled/000-default_https.conf <<EOF
    <IfModule ssl_module>
            <VirtualHost _default_:443>
                    DocumentRoot "/var/www/html"
                    ServerName www.example.com:443
                    ServerAdmin webmaster@example.com
                    ErrorLog "/var/log/httpd2/error_log"
                    TransferLog "/var/log/httpd2/access_log"
                    SSLEngine on
                    SSLProtocol all -SSLv2
                    SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5
                    SSLCertificateFile "/var/lib/ssl/certs/httpd2.cert"
                    SSLCertificateKeyFile "/var/lib/ssl/private/httpd2.key"
                    <FilesMatch "\.(cgi|shtml|phtml|php)$">
                            SSLOptions +StdEnvVars
                    </FilesMatch>
                    <Directory "/var/www/cgi-bin">
                            SSLOptions +StdEnvVars
                    </Directory>
                    <IfModule setenvif_module>
                            BrowserMatch "MSIE [2-5]" \
                                    nokeepalive ssl-unclean-shutdown \
                                    downgrade-1.0 force-response-1.0
                    </IfModule>
                    <IfModule log_config_module>
                            CustomLog "/var/log/httpd2/ssl_request_log" \
                                      "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
                    </IfModule>
                    <IfModule alias_module>
                            ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"
                    </IfModule>
            </VirtualHost>
    </IfModule>
    EOF

    systemctl restart httpd2

    chmod 755 /var/www/cgi-bin/printenv
    chmod 755 /var/www/cgi-bin/test-cgi

    (echo -e '#!/bin/sh\nhttp://localhost/cgi-bin/test-cgi'; cat /var/www/cgi-bin/test-cgi) | sponge /var/www/cgi-bin/test-cgi

    curl -skv https://localhost/cgi-bin/printenv 2>/dev/null | grep REMOTE_ADDR

Ожидаемый результат: REMOTE_ADDR="127.0.0.1"

Фактический результат: REMOTE_ADDR="::1"

Похожие ошибки:

-   https://github.com/curl/curl/pull/12136 - asyn-thread: don’t use
    PF_INET6 for getaddrinfo on Windows

Не воспроизводится, версии:

-   curl-8.1.0-alt2
-   libcurl-8.1.0-alt2