This update for postgresql96 to 9.6.10 fixes the following issues:
These security issues were fixed:
CVE-2018-10915: libpq failed to properly reset its internal state between
connections. If an affected version of libpq was used with 'host' or 'hostaddr'
connection parameters from untrusted input, attackers could have bypassed
client-side connection security features, obtain access to higher privileged
connections or potentially cause other impact SQL injection, by causing the
PQescape() functions to malfunction (bsc#1104199)
CVE-2018-10925: Add missing authorization check on certain statements
involved with 'INSERT ... ON CONFLICT DO UPDATE'. An attacker with 'CREATE
TABLE' privileges could have exploited this to read arbitrary bytes server
memory. If the attacker also had certain 'INSERT' and limited 'UPDATE'
privileges to a particular table, they could have exploited this to update
other columns in the same table (bsc#1104202)
For addition details please see
https://www.postgresql.org/docs/current/static/release-9-6-10.html