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| author | Noah Misch <noah@leadboat.com> | 2018-02-26 07:39:44 -0800 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2018-02-26 07:39:48 -0800 |
| commit | 91f3ffc5249eff99c311fb27e7b29a44d9c62be1 (patch) | |
| tree | 3e1da7c2dcb544d0df7dc1e867549bcf099065cb /src/bin/scripts/createlang.c | |
| parent | a8fc37a6381c0c2a5064d51aa31c72168c01a49a (diff) | |
| download | postgresql-91f3ffc5249eff99c311fb27e7b29a44d9c62be1.tar.gz postgresql-91f3ffc5249eff99c311fb27e7b29a44d9c62be1.zip | |
Empty search_path in Autovacuum and non-psql/pgbench clients.
This makes the client programs behave as documented regardless of the
connect-time search_path and regardless of user-created objects. Today,
a malicious user with CREATE permission on a search_path schema can take
control of certain of these clients' queries and invoke arbitrary SQL
functions under the client identity, often a superuser. This is
exploitable in the default configuration, where all users have CREATE
privilege on schema "public".
This changes behavior of user-defined code stored in the database, like
pg_index.indexprs and pg_extension_config_dump(). If they reach code
bearing unqualified names, "does not exist" or "no schema has been
selected to create in" errors might appear. Users may fix such errors
by schema-qualifying affected names. After upgrading, consider watching
server logs for these errors.
The --table arguments of src/bin/scripts clients have been lax; for
example, "vacuumdb -Zt pg_am\;CHECKPOINT" performed a checkpoint. That
now fails, but for now, "vacuumdb -Zt 'pg_am(amname);CHECKPOINT'" still
performs a checkpoint.
Back-patch to 9.3 (all supported versions).
Reviewed by Tom Lane, though this fix strategy was not his first choice.
Reported by Arseniy Sharoglazov.
Security: CVE-2018-1058
Diffstat (limited to 'src/bin/scripts/createlang.c')
| -rw-r--r-- | src/bin/scripts/createlang.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/bin/scripts/createlang.c b/src/bin/scripts/createlang.c index 74402c3b795..34bb9e1f355 100644 --- a/src/bin/scripts/createlang.c +++ b/src/bin/scripts/createlang.c @@ -141,7 +141,7 @@ main(int argc, char *argv[]) static const bool translate_columns[] = {false, true}; conn = connectDatabase(dbname, host, port, username, prompt_password, - progname, false, false); + progname, echo, false, false); printfPQExpBuffer(&sql, "SELECT lanname as \"%s\", " "(CASE WHEN lanpltrusted THEN '%s' ELSE '%s' END) as \"%s\" " @@ -181,7 +181,7 @@ main(int argc, char *argv[]) *p += ('a' - 'A'); conn = connectDatabase(dbname, host, port, username, prompt_password, - progname, false, false); + progname, echo, false, false); /* * Make sure the language isn't already installed |