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FreeBSD: VID-065890C3-725E-11E9-B0E1-6CC21735F730 (CVE-2019-10130): PostgreSQL -- Selectivity estimators bypass row security policies

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FreeBSD: VID-065890C3-725E-11E9-B0E1-6CC21735F730 (CVE-2019-10130): PostgreSQL -- Selectivity estimators bypass row security policies

Severity
4
CVSS
(AV:N/AC:L/Au:S/C:P/I:N/A:N)
Published
05/09/2019
Created
05/14/2019
Added
05/11/2019
Modified
08/08/2019

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

References

  • freebsd-upgrade-package-postgresql10-server
  • freebsd-upgrade-package-postgresql11-server
  • freebsd-upgrade-package-postgresql95-server
  • freebsd-upgrade-package-postgresql96-server

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