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@@ -8188,12 +8188,13 @@ function verifCond($strToEvaluate)
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* Replace eval function to add more security.
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* This function is called by verifCond() or trans() and transnoentitiesnoconv().
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*
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- * @param string $s String to evaluate
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- * @param int $returnvalue 0=No return (used to execute eval($a=something)). 1=Value of eval is returned (used to eval($something)).
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- * @param int $hideerrors 1=Hide errors
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- * @return mixed Nothing or return result of eval
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+ * @param string $s String to evaluate
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+ * @param int $returnvalue 0=No return (used to execute eval($a=something)). 1=Value of eval is returned (used to eval($something)).
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+ * @param int $hideerrors 1=Hide errors
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+ * @param string $onlysimplestring Accept only simple string with char 'a-z0-9\s$_->&|=';
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+ * @return mixed Nothing or return result of eval
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*/
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-function dol_eval($s, $returnvalue = 0, $hideerrors = 1)
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+function dol_eval($s, $returnvalue = 0, $hideerrors = 1, $onlysimplestring = '1')
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{
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// Only global variables can be changed by eval function and returned to caller
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global $db, $langs, $user, $conf, $website, $websitepage;
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@@ -8205,9 +8206,18 @@ function dol_eval($s, $returnvalue = 0, $hideerrors = 1)
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global $obj; // To get $obj used into list when dol_eval is used for computed fields and $obj is not yet $object
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global $soc; // For backward compatibility
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- // Replace dangerous char (used for RCE), we allow only PHP variable testing.
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+ // Test dangerous char (used for RCE), we allow only PHP variable testing.
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+ if ($onlysimplestring == '1') {
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+ //print preg_quote('$_->&|', '/');
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+ if (preg_match('/[^a-z0-9\s'.preg_quote('$_->&|=', '/').']/i', $s)) {
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+ return 'Bad string syntax to evaluate (found chars that are not chars for simplestring): '.$s;
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+ }
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+ }
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if (strpos($s, '`') !== false) {
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- return 'Bad string syntax to evaluate: '.$s;
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+ return 'Bad string syntax to evaluate (backtick char is forbidden): '.$s;
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+ }
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+ if (strpos($s, '.') !== false) {
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+ return 'Bad string syntax to evaluate (dot char is forbidden): '.$s;
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}
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// We block use of php exec or php file functions
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@@ -8215,7 +8225,7 @@ function dol_eval($s, $returnvalue = 0, $hideerrors = 1)
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$forbiddenphpstrings = array_merge($forbiddenphpstrings, array('_ENV', '_SESSION', '_COOKIE', '_GET', '_POST', '_REQUEST'));
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$forbiddenphpfunctions = array("exec", "passthru", "shell_exec", "system", "proc_open", "popen", "eval", "dol_eval", "executeCLI");
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- $forbiddenphpfunctions = array_merge($forbiddenphpfunctions, array("fopen", "file_put_contents", "fputs", "fputscsv", "fwrite", "fpassthru", "unlink", "mkdir", "rmdir", "symlink", "touch", "umask"));
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+ $forbiddenphpfunctions = array_merge($forbiddenphpfunctions, array("fopen", "file_put_contents", "fputs", "fputscsv", "fwrite", "fpassthru", "require", "include", "mkdir", "rmdir", "symlink", "touch", "unlink", "umask"));
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$forbiddenphpfunctions = array_merge($forbiddenphpfunctions, array("function", "call_user_func"));
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$forbiddenphpregex = 'global\s+\$|\b('.implode('|', $forbiddenphpfunctions).')\b';
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