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Filesystem API: Ensure filenames are valid before attempting to unzip them to ensure malformed file paths don't cause issues.

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Merges [41457] to the 4.8 branch.

Built from https://develop.svn.wordpress.org/branches/4.8@41458


git-svn-id: http://core.svn.wordpress.org/branches/4.8@41291 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
John Blackbourn 2017-09-19 14:37:33 +00:00
parent a9b03b1b80
commit 3e77adc619
2 changed files with 9 additions and 1 deletions
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8
wp-admin/includes/file.php
View File

@ -647,6 +647,10 @@ function _unzip_file_ziparchive($file, $to, $needed_dirs = array() ) {
if ( '__MACOSX/' === substr($info['name'], 0, 9) ) // Skip the OS X-created __MACOSX directory
continue;
if ( 0 !== validate_file( $info['name'] ) ) {
return new WP_Error( 'invalid_file_ziparchive', __( 'Could not extract file from archive.' ), $info['name'] );
}
$uncompressed_size += $info['size'];
if ( '/' === substr( $info['name'], -1 ) ) {
@ -807,6 +811,10 @@ function _unzip_file_pclzip($file, $to, $needed_dirs = array()) {
if ( '__MACOSX/' === substr($file['filename'], 0, 9) ) // Don't extract the OS X-created __MACOSX directory files
continue;
if ( 0 !== validate_file( $file['filename'] ) ) {
return new WP_Error( 'invalid_file_pclzip', __( 'Could not extract file from archive.' ), $file['filename'] );
}
if ( ! $wp_filesystem->put_contents( $to . $file['filename'], $file['content'], FS_CHMOD_FILE) )
return new WP_Error( 'copy_failed_pclzip', __( 'Could not copy file.' ), $file['filename'] );
}

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.8.2-alpha-41450';
$wp_version = '4.8.2-alpha-41458';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.