It has come to our attention that the PostGIS Raster support may give more privileges to users than an administrator is willing to grant. These include reading files from the filesystem and opening connections to network hosts.
Both issues can be limited in existing installations by setting the GDAL_SKIP variable (in the PostgreSQL server environment) to the list of all gdal drivers, but some drivers would still be forceably loaded by some operations.
Releases 2.1.3 and 2.0.6 strengthen the code to load no drivers by default and allows for a fine-grained tuning of what’s allowed and what not through postgis-specific environment variables:
Specifies a list of GDAL drivers to enable (rather than skip) By default all drivers are disabled. Example value: “GTiff PNG JPEG”
Enables read support for out-db raster bands if set to 1. By default out-db raster bands reading is disabled.
Upgrade is highly recommended, especially for online services allowing users to run arbitrary SQL queries.
Special thanks to Even Rouault for bringing up the issue and giving advice on its resolution.
The PostGIS development team is pleased to provide bug fix release 2.3.6 and 2.4.3 for the 2.3 and 2.4 stable branches.
Key fixes in these releases are Brin upgrade, ST_Transform schema qualification to fix issues with restore, foreign table, and materialized view use, ClusterKMeans and encoded polyline fixes.
View all closed tickets for 2.4.3 and 2.3.6.
After installing the binaries or after running pg_upgrade, make sure to do:
ALTER EXTENSION postgis UPDATE;
— if you use the other extensions packaged with postgis — make sure to upgrade those as well
ALTER EXTENSION postgis_sfcgal UPDATE; ALTER EXTENSION postgis_topology UPDATE; ALTER EXTENSION postgis_tiger_geocoder UPDATE;
If you use legacy.sql or legacy_minimal.sql, make sure to rerun the version packaged with these releases.
The PostGIS development team has uploaded bug fix releases for the 2.3 and 2.4 stable branches.
The PostGIS development team has uploaded bug fix releases for the 2.2, 2.3 and 2.4 stable branches.