Several vulnerabilities have been discovered in the OpenJDK Java runtime, which may result in denial of service, information disclosure, unauthorized access or bypass of sandbox restrictions.
For Debian 9 stretch, these problems have been fixed in version 8u512-ga-1~deb9u1.
We recommend that you upgrade your openjdk-8 packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.