An issue has been found in icu, a package containing International Components for Unicode.
By not doing a double free in createMetazoneMappings() a crash of the application that uses this function can be avoided.
For Debian 7 Wheezy, these problems have been fixed in version 220.127.116.11-12+deb7u8.
We recommend that you upgrade your icu packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/