diff options
| -rw-r--r-- | phpBB/docs/CHANGELOG.html | 1 | ||||
| -rw-r--r-- | phpBB/includes/functions.php | 7 | ||||
| -rw-r--r-- | tests/security/hash_test.php | 8 |
3 files changed, 16 insertions, 0 deletions
diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html index c2eb48137a..2be63eb866 100644 --- a/phpBB/docs/CHANGELOG.html +++ b/phpBB/docs/CHANGELOG.html @@ -211,6 +211,7 @@ <li>[<a href="http://tracker.phpbb.com/browse/PHPBB3-11368">PHPBB3-11368</a>] - Latest pm reports row count</li> <li>[<a href="http://tracker.phpbb.com/browse/PHPBB3-11583">PHPBB3-11583</a>] - InnoDB supports FULLTEXT index since MySQL 5.6.4.</li> <li>[<a href="http://tracker.phpbb.com/browse/PHPBB3-11740">PHPBB3-11740</a>] - Update link in FAQ to Ideas Centre</li> +<li>[<a href="http://tracker.phpbb.com/browse/PHPBB3-11873">PHPBB3-11873</a>] - Prevent expensive hash computation in phpbb_check_hash() by rejecting very long passwords</li> </ul> <h4>Sub-task</h4> <ul> diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php index b3e50847fd..869396f6b7 100644 --- a/phpBB/includes/functions.php +++ b/phpBB/includes/functions.php @@ -442,6 +442,13 @@ function phpbb_hash($password) */ function phpbb_check_hash($password, $hash) { + if (strlen($password) > 4096) + { + // If the password is too huge, we will simply reject it + // and not let the server try to hash it. + return false; + } + $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; if (strlen($hash) == 34) { diff --git a/tests/security/hash_test.php b/tests/security/hash_test.php index 0c2580c19b..e226365ef3 100644 --- a/tests/security/hash_test.php +++ b/tests/security/hash_test.php @@ -17,5 +17,13 @@ class phpbb_security_hash_test extends phpbb_test_case $this->assertTrue(phpbb_check_hash('test', '$P$9isfrtKXWqrz8PvztXlL3.daw4U0zI1')); $this->assertFalse(phpbb_check_hash('foo', '$H$9isfrtKXWqrz8PvztXlL3.daw4U0zI1')); } + + public function test_check_hash_with_large_input() + { + // 16 MB password, should be rejected quite fast + $start_time = time(); + $this->assertFalse(phpbb_check_hash(str_repeat('a', 1024 * 1024 * 16), '$H$9isfrtKXWqrz8PvztXlL3.daw4U0zI1')); + $this->assertLessThanOrEqual(5, time() - $start_time); + } } |