Multiple security issues were found in PHP, a widely-used open source general purpose scripting language: Multiple out-of-bounds memory accesses were found in the xmlrpc, mbstring and phar extensions and the dns_get_record() function.
For the stable distribution (stretch), these problems have been fixed in version 7.0.33-0+deb9u2.
We recommend that you upgrade your php7.0 packages.
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/