chicken - security update

Multiple vulnerabilities have been found in the CHICKEN Scheme compiler:

• CVE-2016-6830
  Buffer overrun in CHICKEN Scheme’s “process-execute” and
  “process-spawn” procedures from the posix unit
• CVE-2016-6831
  Memory leak in CHICKEN Scheme’s process-execute and process-spawn
  procedures

For Debian 7 Wheezy, these problems have been fixed in version
4.7.0-1+deb7u1.

We recommend that you upgrade your chicken packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;