The remote Debian host is missing a security-related update.
Jonas Klempel reported that tomcat-native, a library giving Tomcat access to the Apache Portable Runtime (APR) library's network connection (socket) implementation and random-number generator, does not properly handle fields longer than 127 bytes when parsing the AIA-Extension field of a client certificate. If OCSP checks are used, this could result in client certificates that should have been rejected to be accepted.
Upgrade the tomcat-native packages. For the oldstable distribution (jessie), this problem has been fixed in version 1.1.32~repack-2+deb8u1. For the stable distribution (stretch), this problem has been fixed in version 1.2.12-2+deb9u1.