It was discovered that there was an information disclosure vulnerability in zookeeper, a distributed co-ordination server. Users who were not authorised to read data were able to view the access control list.
For Debian 7 Wheezy, these problems have been fixed in version 3.4.5+dfsg-2+deb7u2.
We recommend that you upgrade your zookeeper packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/