FreeBSD: VID-065890C3-725E-11E9-B0E1-6CC21735F730 (CVE-2019-10130): PostgreSQL -- Selectivity estimators bypass row security policies
Description
Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-065890C3-725E-11E9-B0E1-6CC21735F730:
The PostgreSQL project reports:
PostgreSQL maintains statistics for tables by sampling
data available in columns; this data is consulted during
the query planning process. Prior to this release, a user
able to execute SQL queries with permissions to read a
given column could craft a leaky operator that could
read whatever data had been sampled from that column.
If this happened to include values from rows that the user
is forbidden to see by a row security policy, the user
could effectively bypass the policy. This is fixed by only
allowing a non-leakproof operator to use this data if
there are no relevant row security policies for the table.
Solution(s)
- freebsd-upgrade-package-postgresql10-server
- freebsd-upgrade-package-postgresql11-server
- freebsd-upgrade-package-postgresql95-server
- freebsd-upgrade-package-postgresql96-server
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