Always require SELECT permission for ON CONFLICT DO UPDATE.
The update path of an INSERT ... ON CONFLICT DO UPDATE requires SELECT
permission on the columns of the arbiter index, but it failed to check
for that in the case of an arbiter specified by constraint name.
In addition, for a table with row level security enabled, it failed to
check updated rows against the table's SELECT policies when the update
path was taken (regardless of how the arbiter index was specified).
Backpatch to 9.5 where ON CONFLICT DO UPDATE and RLS were introduced.
Security: CVE-2017-15099
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/87b2ebd352c4afe1ded0841604b59a3afbae97d1
Modified Files
--------------
src/backend/catalog/pg_constraint.c | 98 +++++++++++++++++++++++++++++++
src/backend/parser/parse_clause.c | 21 ++++++-
src/backend/rewrite/rowsecurity.c | 20 ++++++-
src/include/catalog/pg_constraint_fn.h | 2 +
src/test/regress/expected/privileges.out | 16 ++++-
src/test/regress/expected/rowsecurity.out | 15 ++++-
src/test/regress/sql/privileges.sql | 19 +++++-
src/test/regress/sql/rowsecurity.sql | 14 ++++-
8 files changed, 194 insertions(+), 11 deletions(-)
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