This update of postgresql94 to 9.4.5 fixes the following issues:
CVE-2015-5289: json or jsonb input values constructed from arbitrary user input could have crashed the PostgreSQL server and caused a denial of service (bsc#949670)
CVE-2015-5288: crypt() (pgCrypto extension) couldi potentially be exploited to read a few additional bytes of memory (bsc#949669)
Also contains all changes and bugfixes in the upstream 9.4.5 release:
http://www.postgresql.org/docs/current/static/release-9-4-5.html