From 19d0fb169eed475e1c053e99036b8668625cfa94 Mon Sep 17 00:00:00 2001
From: Jens Rehsack <sno@netbsd.org>
Date: Tue, 6 Oct 2020 10:22:17 +0200
Subject: [PATCH] lib/DBD/File.pm: fix CVE-2014-10401

Dig into the root cause of RT#99508 - which resulted in CVE-2014-10401 - and
figure out that DBI->parse_dsn is the wrong helper to parse our attributes in
DSN, since in DBD::dr::connect only the "dbname" remains from DSN which causes
parse_dsn to bailout.

Parsing on our own similar to parse_dsn shows the way out.

Signed-off-by: Jens Rehsack <sno@netbsd.org>
---
 lib/DBD/File.pm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/DBD/File.pm b/lib/DBD/File.pm
index fb14e9a..f55076f 100644
--- a/lib/DBD/File.pm
+++ b/lib/DBD/File.pm
@@ -109,7 +109,11 @@ sub connect
     # We do not (yet) care about conflicting attributes here
     # my $dbh = DBI->connect ("dbi:CSV:f_dir=test", undef, undef, { f_dir => "text" });
     # will test here that both test and text should exist
-    if (my $attr_hash = (DBI->parse_dsn ($dbname))[3]) {
+    #
+    # Parsing on our own similar to parse_dsn to find attributes in 'dbname' parameter.
+    if ($dbname) {
+	my @attrs = split /;/ => $dbname;
+	my $attr_hash = { map { split /\s*=>?\s*|\s*,\s*/, $_} @attrs };
 	if (defined $attr_hash->{f_dir} && ! -d $attr_hash->{f_dir}) {
 	    my $msg = "No such directory '$attr_hash->{f_dir}";
 	    $drh->set_err (2, $msg);
@@ -120,7 +124,6 @@ sub connect
     if ($attr and defined $attr->{f_dir} && ! -d $attr->{f_dir}) {
 	my $msg = "No such directory '$attr->{f_dir}";
 	$drh->set_err (2, $msg);
-	$attr->{RaiseError} and croak $msg;
 	return;
 	}
 
From 27b10b5c3aacabc091046beaba478e671bb6111c Mon Sep 17 00:00:00 2001
From: Jens Rehsack <sno@netbsd.org>
Date: Tue, 6 Oct 2020 08:23:55 +0200
Subject: [PATCH] t/51dbm_file.t: add test from RT#99508

Add test with f_dir="something-not-existing" as reported in RT#99508
to verify when it's fixed for real.

Signed-off-by: Jens Rehsack <sno@netbsd.org>
---
 t/51dbm_file.t | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/t/51dbm_file.t b/t/51dbm_file.t
index d9824cf..686a3d2 100644
--- a/t/51dbm_file.t
+++ b/t/51dbm_file.t
@@ -15,6 +15,27 @@ use DBI;
 
 do "./t/lib.pl";
 
+{
+    # test issue reported in RT#99508
+    my @msg;
+    eval {
+	local $SIG{__DIE__} = sub { push @msg, @_ };
+	my $dbh = DBI->connect ("dbi:DBM:f_dir=./hopefully-doesnt-existst;sql_identifier_case=1;RaiseError=1");
+    };
+    like ("@msg", qr{.*hopefully-doesnt-existst.*}, "Cannot open from non-existing directory with attributes in DSN");
+
+    @msg = ();
+    eval {
+	local $SIG{__DIE__} = sub { push @msg, @_ };
+	my $dbh = DBI->connect ("dbi:DBM:", , undef, undef, {
+	    f_dir               => "./hopefully-doesnt-existst",
+	    sql_identifier_case => 1,
+	    RaiseError          => 1,
+	});
+    };
+    like ("@msg", qr{.*hopefully-doesnt-existst}, "Cannot open from non-existing directory with attributes in HASH");
+}
+
 my $dir = test_dir();
 
 my $dbh = DBI->connect( 'dbi:DBM:', undef, undef, {
@@ -23,6 +44,8 @@ my $dbh = DBI->connect( 'dbi:DBM:', undef, undef, {
     }
 );
 
+ok( $dbh, "Connect with driver attributes in hash" );
+
 ok( $dbh->do(q/drop table if exists FRED/), 'drop table' );
 
 my $dirfext = $^O eq 'VMS' ? '.sdbm_dir' : '.dir';