Lock down regression testing temporary clusters on Windows.

Use SSPI authentication to allow connections exclusively from the OS
user that launched the test suite.  This closes on Windows the
vulnerability that commit be76a6d3
closed on other platforms.  Users of "make installcheck" or custom test
harnesses can run "pg_regress --config-auth=DATADIR" to activate the
same authentication configuration that "make check" would use.
Back-patch to 9.0 (all supported versions).

Security: CVE-2014-0067

contrib/pg_upgrade/test.sh

@@ -17,13 +17,20 @@ set -e
 unset MAKEFLAGS
 unset MAKELEVEL
 
+# Run a given "initdb" binary and overlay the regression testing
+# authentication configuration.
+standard_initdb() {
+	"$1" -N
+	../../src/test/regress/pg_regress --config-auth "$PGDATA"
+}
+
 # Establish how the server will listen for connections
 testhost=`uname -s`
 
 case $testhost in
 	MINGW*)
 		LISTEN_ADDRESSES="localhost"
-		PGHOST=""; unset PGHOST
+		PGHOST=localhost
 		;;
 	*)
 		LISTEN_ADDRESSES=""
@@ -49,11 +56,11 @@ case $testhost in
 			trap 'rm -rf "$PGHOST"' 0
 			trap 'exit 3' 1 2 13 15
 		fi
-		export PGHOST
 		;;
 esac
 
 POSTMASTER_OPTS="-F -c listen_addresses=$LISTEN_ADDRESSES -k \"$PGHOST\""
+export PGHOST
 
 temp_root=$PWD/tmp_check
 
@@ -141,7 +148,7 @@ export EXTRA_REGRESS_OPTS
 # enable echo so the user can see what is being executed
 set -x
 
-"$oldbindir"/initdb -N
+standard_initdb "$oldbindir"/initdb
 "$oldbindir"/pg_ctl start -l "$logdir/postmaster1.log" -o "$POSTMASTER_OPTS" -w
 if "$MAKE" -C "$oldsrc" installcheck; then
 	pg_dumpall -f "$temp_root"/dump1.sql || pg_dumpall1_status=$?
@@ -181,7 +188,7 @@ fi
 
 PGDATA=$BASE_PGDATA
 
-initdb -N
+standard_initdb 'initdb'
 
 pg_upgrade $PG_UPGRADE_OPTS -d "${PGDATA}.old" -D "${PGDATA}" -b "$oldbindir" -B "$bindir" -p "$PGPORT" -P "$PGPORT"
 

doc/src/sgml/regress.sgml

@@ -56,19 +56,6 @@ make check
    <quote>failure</> represents a serious problem.
   </para>
 
-  <warning>
-   <para>
-    On systems lacking Unix-domain sockets, notably Windows, this test method
-    starts a temporary server configured to accept any connection originating
-    on the local machine.  Any local user can gain database superuser
-    privileges when connecting to this server, and could in principle exploit
-    all privileges of the operating-system user running the tests.  Therefore,
-    it is not recommended that you use <literal>make check</> on an affected
-    system shared with untrusted users.  Instead, run the tests after
-    completing the installation, as described in the next section.
-   </para>
-  </warning>
-
    <para>
     Because this test method runs a temporary server, it will not work
     if you did the build as the root user, since the server will not start as

src/Makefile.global.in

@@ -323,7 +323,7 @@ endef
 define prove_check
 $(MKDIR_P) tmp_check/log
 $(MAKE) -C $(top_builddir) DESTDIR='$(CURDIR)'/tmp_check/install install >'$(CURDIR)'/tmp_check/log/install.log 2>&1
-cd $(srcdir) && TESTDIR='$(CURDIR)' PATH="$(CURDIR)/tmp_check/install$(bindir):$$PATH" $(call add_to_path,$(ld_library_path_var),$(CURDIR)/tmp_check/install$(libdir)) PGPORT='6$(DEF_PGPORT)' $(PROVE) $(PG_PROVE_FLAGS) $(PROVE_FLAGS) t/*.pl
+cd $(srcdir) && TESTDIR='$(CURDIR)' PATH="$(CURDIR)/tmp_check/install$(bindir):$$PATH" $(call add_to_path,$(ld_library_path_var),$(CURDIR)/tmp_check/install$(libdir)) top_srcdir='$(top_srcdir)' PGPORT='6$(DEF_PGPORT)' $(PROVE) $(PG_PROVE_FLAGS) $(PROVE_FLAGS) t/*.pl
 endef
 
 else

src/bin/pg_ctl/t/001_start_stop.pl

 use strict;
 use warnings;
 use TestLib;
-use Test::More tests => 16;
+use Test::More tests => 17;
 
 my $tempdir = TestLib::tempdir;
 my $tempdir_short = TestLib::tempdir_short;
@@ -14,6 +14,10 @@ command_exit_is([ 'pg_ctl', 'start', '-D', "$tempdir/nonexistent" ],
 				1, 'pg_ctl start with nonexistent directory');
 
 command_ok([ 'pg_ctl', 'initdb', '-D', "$tempdir/data" ], 'pg_ctl initdb');
+command_ok(
+	[   "$ENV{top_srcdir}/src/test/regress/pg_regress", '--config-auth',
+		"$tempdir/data" ],
+	'configure authentication');
 open CONF, ">>$tempdir/data/postgresql.conf";
 print CONF "listen_addresses = ''\n";
 print CONF "unix_socket_directories = '$tempdir_short'\n";

src/bin/pg_ctl/t/002_status.pl

@@ -9,7 +9,7 @@ my $tempdir_short = TestLib::tempdir_short;
 command_exit_is([ 'pg_ctl', 'status', '-D', "$tempdir/nonexistent" ],
 	4, 'pg_ctl status with nonexistent directory');
 
-system_or_bail "initdb -D '$tempdir'/data -A trust >/dev/null";
+standard_initdb "$tempdir/data";
 open CONF, ">>$tempdir/data/postgresql.conf";
 print CONF "listen_addresses = ''\n";
 print CONF "unix_socket_directories = '$tempdir_short'\n";

src/test/perl/TestLib.pm

@@ -7,6 +7,7 @@ use Exporter 'import';
 our @EXPORT = qw(
   tempdir
   tempdir_short
+  standard_initdb
   start_test_server
   restart_test_server
   psql
@@ -69,6 +70,14 @@ sub tempdir_short
 	return File::Temp::tempdir(CLEANUP => 1);
 }
 
+sub standard_initdb
+{
+	my $pgdata = shift;
+	system_or_bail("initdb -D '$pgdata' -A trust -N >/dev/null");
+	system_or_bail("$ENV{top_srcdir}/src/test/regress/pg_regress",
+				   '--config-auth', $pgdata);
+}
+
 my ($test_server_datadir, $test_server_logfile);
 
 sub start_test_server
@@ -78,7 +87,7 @@ sub start_test_server
 
 	my $tempdir_short = tempdir_short;
 
-	system "initdb -D '$tempdir'/pgdata -A trust -N >/dev/null";
+	standard_initdb "$tempdir/pgdata";
 	$ret = system 'pg_ctl', '-D', "$tempdir/pgdata", '-s', '-w', '-l',
 	  "$tempdir/logfile", '-o',
 	  "--fsync=off -k $tempdir_short --listen-addresses='' --log-statement=all",

src/test/regress/pg_regress.c

@@ -29,6 +29,7 @@
 #include <sys/resource.h>
 #endif
 
+#include "common/username.h"
 #include "getopt_long.h"
 #include "libpq/pqcomm.h"		/* needed for UNIXSOCK_PATH() */
 #include "pg_config_paths.h"
@@ -104,6 +105,7 @@ static char *dlpath = PKGLIBDIR;
 static char *user = NULL;
 static _stringlist *extraroles = NULL;
 static _stringlist *extra_install = NULL;
+static char *config_auth_datadir = NULL;
 
 /* internal variables */
 static const char *progname;
@@ -965,6 +967,150 @@ initialize_environment(void)
 	load_resultmap();
 }
 
+#ifdef ENABLE_SSPI
+/*
+ * Get account and domain/realm names for the current user.  This is based on
+ * pg_SSPI_recvauth().  The returned strings use static storage.
+ */
+static void
+current_windows_user(const char **acct, const char **dom)
+{
+	static char accountname[MAXPGPATH];
+	static char domainname[MAXPGPATH];
+	HANDLE		token;
+	TOKEN_USER *tokenuser;
+	DWORD		retlen;
+	DWORD		accountnamesize = sizeof(accountname);
+	DWORD		domainnamesize = sizeof(domainname);
+	SID_NAME_USE accountnameuse;
+
+	if (!OpenProcessToken(GetCurrentProcess(), TOKEN_READ, &token))
+	{
+		fprintf(stderr,
+				_("%s: could not open process token: error code %lu\n"),
+				progname, GetLastError());
+		exit(2);
+	}
+
+	if (!GetTokenInformation(token, TokenUser, NULL, 0, &retlen) && GetLastError() != 122)
+	{
+		fprintf(stderr,
+				_("%s: could not get token user size: error code %lu\n"),
+				progname, GetLastError());
+		exit(2);
+	}
+	tokenuser = malloc(retlen);
+	if (!GetTokenInformation(token, TokenUser, tokenuser, retlen, &retlen))
+	{
+		fprintf(stderr,
+				_("%s: could not get token user: error code %lu\n"),
+				progname, GetLastError());
+		exit(2);
+	}
+
+	if (!LookupAccountSid(NULL, tokenuser->User.Sid, accountname, &accountnamesize,
+						  domainname, &domainnamesize, &accountnameuse))
+	{
+		fprintf(stderr,
+				_("%s: could not look up account SID: error code %lu\n"),
+				progname, GetLastError());
+		exit(2);
+	}
+
+	free(tokenuser);
+
+	*acct = accountname;
+	*dom = domainname;
+}
+
+/*
+ * Rewrite pg_hba.conf and pg_ident.conf to use SSPI authentication.  Permit
+ * the current OS user to authenticate as the bootstrap superuser and as any
+ * user named in a --create-role option.
+ */
+static void
+config_sspi_auth(const char *pgdata)
+{
+	const char *accountname,
+			   *domainname;
+	const char *username;
+	char	   *errstr;
+	char		fname[MAXPGPATH];
+	int			res;
+	FILE	   *hba,
+			   *ident;
+	_stringlist *sl;
+
+	/*
+	 * "username", the initdb-chosen bootstrap superuser name, may always
+	 * match "accountname", the value SSPI authentication discovers.  The
+	 * underlying system functions do not clearly guarantee that.
+	 */
+	current_windows_user(&accountname, &domainname);
+	username = get_user_name(&errstr);
+	if (username == NULL)
+	{
+		fprintf(stderr, "%s: %s\n", progname, errstr);
+		exit(2);
+	}
+
+	/* Check a Write outcome and report any error. */
+#define CW(cond)	\
+	do { \
+		if (!(cond)) \
+		{ \
+			fprintf(stderr, _("%s: could not write to file \"%s\": %s\n"), \
+					progname, fname, strerror(errno)); \
+			exit(2); \
+		} \
+	} while (0)
+
+	res = snprintf(fname, sizeof(fname), "%s/pg_hba.conf", pgdata);
+	if (res < 0 || res >= sizeof(fname) - 1)
+	{
+		/*
+		 * Truncating this name is a fatal error, because we must not fail to
+		 * overwrite an original trust-authentication pg_hba.conf.
+		 */
+		fprintf(stderr, _("%s: directory name too long\n"), progname);
+		exit(2);
+	}
+	hba = fopen(fname, "w");
+	if (hba == NULL)
+	{
+		fprintf(stderr, _("%s: could not open file \"%s\" for writing: %s\n"),
+				progname, fname, strerror(errno));
+		exit(2);
+	}
+	CW(fputs("# Configuration written by config_sspi_auth()\n", hba) >= 0);
+	CW(fputs("host all all 127.0.0.1/32  sspi include_realm=1 map=regress\n",
+			 hba) >= 0);
+	CW(fclose(hba) == 0);
+
+	snprintf(fname, sizeof(fname), "%s/pg_ident.conf", pgdata);
+	ident = fopen(fname, "w");
+	if (ident == NULL)
+	{
+		fprintf(stderr, _("%s: could not open file \"%s\" for writing: %s\n"),
+				progname, fname, strerror(errno));
+		exit(2);
+	}
+	CW(fputs("# Configuration written by config_sspi_auth()\n", ident) >= 0);
+
+	/*
+	 * Double-quote for the benefit of account names containing whitespace or
+	 * '#'.  Windows forbids the double-quote character itself, so don't
+	 * bother escaping embedded double-quote characters.
+	 */
+	CW(fprintf(ident, "regress  \"%s@%s\"  \"%s\"\n",
+			   accountname, domainname, username) >= 0);
+	for (sl = extraroles; sl; sl = sl->next)
+		CW(fprintf(ident, "regress  \"%s@%s\"  \"%s\"\n",
+				   accountname, domainname, sl->str) >= 0);
+	CW(fclose(ident) == 0);
+}
+#endif
+
 /*
  * Issue a command via psql, connecting to the specified database
  *
@@ -1957,6 +2103,7 @@ help(void)
 	printf(_("Usage:\n  %s [OPTION]... [EXTRA-TEST]...\n"), progname);
 	printf(_("\n"));
 	printf(_("Options:\n"));
+	printf(_("  --config-auth=DATADIR     update authentication settings for DATADIR\n"));
 	printf(_("  --create-role=ROLE        create the specified role before testing\n"));
 	printf(_("  --dbname=DB               use database DB (default \"regression\")\n"));
 	printf(_("  --debug                   turn on debug mode in programs that are run\n"));
@@ -2023,6 +2170,7 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 		{"launcher", required_argument, NULL, 21},
 		{"load-extension", required_argument, NULL, 22},
 		{"extra-install", required_argument, NULL, 23},
+		{"config-auth", required_argument, NULL, 24},
 		{NULL, 0, NULL, 0}
 	};
 
@@ -2137,6 +2285,9 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 			case 23:
 				add_stringlist_item(&extra_install, optarg);
 				break;
+			case 24:
+				config_auth_datadir = pstrdup(optarg);
+				break;
 			default:
 				/* getopt_long already emitted a complaint */
 				fprintf(stderr, _("\nTry \"%s -h\" for more information.\n"),
@@ -2154,6 +2305,14 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 		optind++;
 	}
 
+	if (config_auth_datadir)
+	{
+#ifdef ENABLE_SSPI
+		config_sspi_auth(config_auth_datadir);
+#endif
+		exit(0);
+	}
+
 	if (temp_install && !port_specified_by_user)
 
 		/*
@@ -2298,6 +2457,18 @@ regression_main(int argc, char *argv[], init_function ifunc, test_function tfunc
 
 		fclose(pg_conf);
 
+#ifdef ENABLE_SSPI
+
+		/*
+		 * Since we successfully used the same buffer for the much-longer
+		 * "initdb" command, this can't truncate.
+		 */
+		snprintf(buf, sizeof(buf), "%s/data", temp_install);
+		config_sspi_auth(buf);
+#elif !defined(HAVE_UNIX_SOCKETS)
+#error Platform has no means to secure the test installation.
+#endif
+
 		/*
 		 * Check if there is a postmaster running already.
 		 */

src/tools/msvc/vcregress.pl

@@ -247,6 +247,15 @@ sub contribcheck
 	exit $mstat if $mstat;
 }
 
+# Run "initdb", then reconfigure authentication.
+sub standard_initdb
+{
+	return (
+		system('initdb', '-N') == 0 and system(
+			"$topdir/$Config/pg_regress/pg_regress", '--config-auth',
+			$ENV{PGDATA}) == 0);
+}
+
 sub upgradecheck
 {
 	my $status;
@@ -258,6 +267,7 @@ sub upgradecheck
 	# i.e. only this version to this version check. That's
 	# what pg_upgrade's "make check" does.
 
+	$ENV{PGHOST} = 'localhost';
 	$ENV{PGPORT} ||= 50432;
 	my $tmp_root = "$topdir/contrib/pg_upgrade/tmp_check";
 	(mkdir $tmp_root || die $!) unless -d $tmp_root;
@@ -275,7 +285,7 @@ sub upgradecheck
 	my $logdir = "$topdir/contrib/pg_upgrade/log";
 	(mkdir $logdir || die $!) unless -d $logdir;
 	print "\nRunning initdb on old cluster\n\n";
-	system("initdb") == 0 or exit 1;
+	standard_initdb() or exit 1;
 	print "\nStarting old cluster\n\n";
 	system("pg_ctl start -l $logdir/postmaster1.log -w") == 0 or exit 1;
 	print "\nSetting up data for upgrading\n\n";
@@ -289,7 +299,7 @@ sub upgradecheck
 	system("pg_ctl -m fast stop") == 0 or exit 1;
 	$ENV{PGDATA} = "$data";
 	print "\nSetting up new cluster\n\n";
-	system("initdb") == 0 or exit 1;
+	standard_initdb() or exit 1;
 	print "\nRunning pg_upgrade\n\n";
 	system("pg_upgrade -d $data.old -D $data -b $bindir -B $bindir") == 0
 	  or exit 1;