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
------
REL9_5_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/045a18888f38bd46f5b50e145470095f461cc41c
Modified Files
--------------
src/backend/catalog/pg_constraint.c | 99 +++++++++++++++++++++++++++++++
src/backend/parser/parse_clause.c | 21 ++++++-
src/backend/rewrite/rowsecurity.c | 20 ++++++-
src/include/catalog/pg_constraint.h | 2 +
src/test/regress/expected/privileges.out | 18 +++++-
src/test/regress/expected/rowsecurity.out | 15 ++++-
src/test/regress/sql/privileges.sql | 21 ++++++-
src/test/regress/sql/rowsecurity.sql | 14 ++++-
8 files changed, 197 insertions(+), 13 deletions(-)
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