HTTPS_PROXY isn't called even if VULNXML_SITE is set to a secure URL (rather HTTP_PROXY is consulted).VULNXML_SITE you may also need to specify a certificate path (assuming security/ca_root_nss is installed:PKG_ENV {
FTP_PROXY: proxy_hostname:proxy_port
HTTP_PROXY: proxy_hostname:proxy_port
HTTPS_PROXY: proxy_hostname:proxy_port
SSL_CA_CERT_PATH /usr/local/share/certs
}
HTTP_PROXY and SSL_CA_CERT_PATH for both VULNXML_SITE = "http://..." and VULNXML_SITE = "https://..."