security #cve-2019-11325 [VarExporter] fix exporting some strings (nicolas-grekas)
This PR was merged into the 4.2 branch.
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commit
9067fdc950
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@ -212,27 +212,28 @@ class Exporter
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$subIndent = $indent.' ';
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if (\is_string($value)) {
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$code = var_export($value, true);
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$code = sprintf("'%s'", addcslashes($value, "'\\"));
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if (false !== strpos($value, "\n") || false !== strpos($value, "\r")) {
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$code = strtr($code, [
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"\r\n" => "'.\"\\r\\n\"\n".$subIndent.".'",
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"\r" => "'.\"\\r\"\n".$subIndent.".'",
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"\n" => "'.\"\\n\"\n".$subIndent.".'",
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]);
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$code = preg_replace_callback('/([\0\r\n]++)(.)/', function ($m) use ($subIndent) {
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$m[1] = sprintf('\'."%s".\'', str_replace(
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["\0", "\r", "\n", '\n\\'],
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['\0', '\r', '\n', '\n"'."\n".$subIndent.'."\\'],
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$m[1]
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));
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if ("'" === $m[2]) {
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return substr($m[1], 0, -2);
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}
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if (false !== strpos($value, "\0")) {
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$code = str_replace('\' . "\0" . \'', '\'."\0".\'', $code);
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$code = str_replace('".\'\'."', '', $code);
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if ('n".\'' === substr($m[1], -4)) {
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return substr_replace($m[1], "\n".$subIndent.".'".$m[2], -2);
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}
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if (false !== strpos($code, "''.")) {
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$code = str_replace("''.", '', $code);
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}
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return $m[1].$m[2];
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}, $code, -1, $count);
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if (".''" === substr($code, -3)) {
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$code = rtrim(substr($code, 0, -3));
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if ($count && 0 === strpos($code, "''.")) {
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$code = substr($code, 3);
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}
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return $code;
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@ -0,0 +1,4 @@
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<?php
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return '\'BOOM\''."\n"
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.'.var_dump(123)//\'';
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@ -2,7 +2,6 @@
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return [
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"\0\0\r\n"
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.'A' => 'B'."\r"
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.'C'."\n"
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.'A' => 'B'."\r".'C'."\n"
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."\n",
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];
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@ -109,6 +109,7 @@ class VarExporterTest extends TestCase
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public function provideExport()
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{
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yield ['multiline-string', ["\0\0\r\nA" => "B\rC\n\n"], true];
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yield ['lf-ending-string', "'BOOM'\n.var_dump(123)//'", true];
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yield ['bool', true, true];
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yield ['simple-array', [123, ['abc']], true];
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