Hi, attached is patch to fix this issue. Cheers Nico
-- Nico Golde - http://www.ngolde.de - n...@jabber.ccc.de - GPG: 0x73647CFF For security reasons, all text in this mail is double-rot13 encrypted.
diff -u mahara-1.1.2/debian/changelog mahara-1.1.2/debian/changelog
--- mahara-1.1.2/debian/changelog
+++ mahara-1.1.2/debian/changelog
@@ -1,3 +1,12 @@
+mahara (1.1.2-1.1) unstable; urgency=high
+
+ * Non-maintainer upload by the Security Team.
+ * Update to latest html2text.php copy of roundcube to prevent
+ arbitrary code execution caused be the /e modifier of
+ preg_replace (CVE-2008-5619; Closes: #524778).
+
+ -- Nico Golde <n...@debian.org> Mon, 20 Apr 2009 21:23:16 +0200
+
mahara (1.1.2-1) unstable; urgency=high
* New Upstream Version
only in patch2:
unchanged:
--- mahara-1.1.2.orig/htdocs/lib/html2text/class.html2text.php
+++ mahara-1.1.2/htdocs/lib/html2text/class.html2text.php
@@ -149,26 +149,18 @@
'/<script[^>]*>.*?<\/script>/i', // <script>s -- which strip_tags supposedly has problems with
'/<style[^>]*>.*?<\/style>/i', // <style>s -- which strip_tags supposedly has problems with
//'/<!-- .* -->/', // Comments -- which strip_tags might have problem a with
- '/<h[123][^>]*>(.*?)<\/h[123]>/ie', // H1 - H3
- '/<h[456][^>]*>(.*?)<\/h[456]>/ie', // H4 - H6
'/<p[^>]*>/i', // <P>
'/<br[^>]*>/i', // <br>
- '/<b[^>]*>(.*?)<\/b>/i', // <b>
- '/<strong[^>]*>(.*?)<\/strong>/i', // <strong>
'/<i[^>]*>(.*?)<\/i>/i', // <i>
'/<em[^>]*>(.*?)<\/em>/i', // <em>
'/(<ul[^>]*>|<\/ul>)/i', // <ul> and </ul>
'/(<ol[^>]*>|<\/ol>)/i', // <ol> and </ol>
'/<li[^>]*>(.*?)<\/li>/i', // <li> and </li>
'/<li[^>]*>/i', // <li>
- '/<a [^>]*href="([^"]+)"[^>]*>(.*?)<\/a>/ie',
- // <a href="">
'/<hr[^>]*>/i', // <hr>
- '/<img[^>]*alt="([^"]+)"[^>]*>/i', // <img>
'/(<table[^>]*>|<\/table>)/i', // <table> and </table>
'/(<tr[^>]*>|<\/tr>)/i', // <tr> and </tr>
'/<td[^>]*>(.*?)<\/td>/i', // <td> and </td>
- '/<th[^>]*>(.*?)<\/th>/ie', // <th> and </th>
'/&(nbsp|#160);/i', // Non-breaking space
'/&(quot|rdquo|ldquo|#8220|#8221|#147|#148);/i',
// Double quotes
@@ -202,26 +194,18 @@
'', // <script>s -- which strip_tags supposedly has problems with
'', // <style>s -- which strip_tags supposedly has problems with
//'', // Comments -- which strip_tags might have problem a with
- "ucwords(\"\n\n_\\1_\n\n\")", // H1 - H3
- "ucwords(\"\n\n\\1\n\n\")", // H4 - H6
- "\n\n", // <P>
+ "\n\n", // <P>
"\n", // <br>
- '_\\1_', // <b>
- '_\\1_', // <strong>
'_\\1_', // <i>
'_\\1_', // <em>
"\n\n", // <ul> and </ul>
"\n\n", // <ol> and </ol>
- " * \\1\n", // <li> and </li>
- "\n * ", // <li>
- '$this->_build_link_list("\\1", "\\2")',
- // <a href="">
- "\n-------------------------\n", // <hr>
- "[\\1]", // <img>
- "\n\n", // <table> and </table>
+ "\t* \\1\n", // <li> and </li>
+ "\n\t* ", // <li>
+ "\n-------------------------\n", // <hr>
+ "\n\n", // <table> and </table>
"\n", // <tr> and </tr>
"\t\t\\1\n", // <td> and </td>
- "ucwords(\"\t\t\\1\n\")", // <th> and </th>
' ', // Non-breaking space
'"', // Double quotes
"'", // Single quotes
@@ -234,13 +218,60 @@
'--',
'-',
'*',
- '£',
+ '£',
'EUR', // Euro sign. ?
'', // Unknown/unhandled entities
' ' // Runs of spaces, post-handling
);
/**
+ * List of preg* regular expression patterns to search for
+ * and replace using callback function.
+ *
+ * @var array $callback_search
+ * @access public
+ */
+ var $callback_search = array(
+ '/<(h)[123456][^>]*>(.*?)<\/h[123456]>/i', // H1 - H3
+ '/<(b)[^>]*>(.*?)<\/b>/i', // <b>
+ '/<(strong)[^>]*>(.*?)<\/strong>/i', // <strong>
+ '/<(a) [^>]*href=("|\')([^"\']+)\2[^>]*>(.*?)<\/a>/i',
+ // <a href="">
+ '/<(th)[^>]*>(.*?)<\/th>/i', // <th> and </th>
+ );
+
+ /**
+ * List of preg* regular expression patterns to search for in PRE body,
+ * used in conjunction with $pre_replace.
+ *
+ * @var array $pre_search
+ * @access public
+ * @see $pre_replace
+ */
+ var $pre_search = array(
+ "/\n/",
+ "/\t/",
+ '/ /',
+ '/<pre[^>]*>/',
+ '/<\/pre>/'
+ );
+
+ /**
+ * List of pattern replacements corresponding to patterns searched for PRE body.
+ *
+ * @var array $pre_replace
+ * @access public
+ * @see $pre_search
+ */
+ var $pre_replace = array(
+ '<br>',
+ ' ',
+ ' ',
+ '',
+ ''
+ );
+
+ /**
* Contains a list of HTML tags to allow in the resulting text.
*
* @var string $allowed_tags
@@ -285,6 +316,15 @@
*/
var $_link_count = 0;
+ /**
+ * Boolean flag, true if a table of link URLs should be listed after the text.
+ *
+ * @var boolean $_do_links
+ * @access private
+ * @see html2text()
+ */
+ var $_do_links = true;
+
/**
* Constructor.
*
@@ -294,15 +334,20 @@
*
* @param string $source HTML content
* @param boolean $from_file Indicates $source is a file to pull content from
+ * @param boolean $do_links Indicate whether a table of link URLs is desired
+ * @param integer $width Maximum width of the formatted text, 0 for no limit
* @access public
* @return void
*/
- function html2text( $source = '', $from_file = false )
+ function html2text( $source = '', $from_file = false, $do_links = true, $width = 75 )
{
if ( !empty($source) ) {
$this->set_html($source, $from_file);
}
+
$this->set_base_url();
+ $this->_do_links = $do_links;
+ $this->width = $width;
}
/**
@@ -315,13 +360,11 @@
*/
function set_html( $source, $from_file = false )
{
- $this->html = $source;
-
if ( $from_file && file_exists($source) ) {
- $fp = fopen($source, 'r');
- $this->html = fread($fp, filesize($source));
- fclose($fp);
+ $this->html = file_get_contents($source);
}
+ else
+ $this->html = $source;
$this->_converted = false;
}
@@ -422,8 +465,15 @@
$text = trim(stripslashes($this->html));
+ // Convert <PRE>
+ $this->_convert_pre($text);
+
+ // Replace known html entities
+ $text = html_entity_decode($text, ENT_COMPAT, 'UTF-8');
+
// Run our defined search-and-replace
$text = preg_replace($this->search, $this->replace, $text);
+ $text = preg_replace_callback($this->callback_search, array('html2text', '_preg_callback'), $text);
// Strip any other HTML tags
$text = strip_tags($text, $this->allowed_tags);
@@ -464,7 +514,9 @@
*/
function _build_link_list( $link, $display )
{
- if ( substr($link, 0, 7) == 'http://' || substr($link, 0, 8) == 'https://' ||
+ if ( !$this->_do_links ) return $display;
+
+ if ( substr($link, 0, 7) == 'http://' || substr($link, 0, 8) == 'https://' ||
substr($link, 0, 7) == 'mailto:' ) {
$this->_link_count++;
$this->_link_list .= "[" . $this->_link_count . "] $link\n";
@@ -485,7 +537,59 @@
return $display . $additional;
}
+
+ /**
+ * Helper function for PRE body conversion.
+ *
+ * @param string HTML content
+ * @access private
+ */
+ function _convert_pre(&$text)
+ {
+ while(preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches))
+ {
+ $result = preg_replace($this->pre_search, $this->pre_replace, $matches[1]);
+ $text = preg_replace('/<pre[^>]*>.*<\/pre>/ismU', '<div><br>' . $result . '<br></div>', $text, 1);
+ }
+ }
+ /**
+ * Callback function for preg_replace_callback use.
+ *
+ * @param array PREG matches
+ * @return string
+ * @access private
+ */
+ function _preg_callback($matches)
+ {
+ switch($matches[1])
+ {
+ case 'b':
+ case 'strong':
+ return $this->_strtoupper($matches[2]);
+ case 'hr':
+ return $this->_strtoupper("\t\t". $matches[2] ."\n");
+ case 'h':
+ return $this->_strtoupper("\n\n". $matches[2] ."\n\n");
+ case 'a':
+ return $this->_build_link_list($matches[3], $matches[4]);
+ }
+ }
+
+ /**
+ * Strtoupper multibyte wrapper function
+ *
+ * @param string
+ * @return string
+ * @access private
+ */
+ function _strtoupper($str)
+ {
+ if (function_exists('mb_strtoupper'))
+ return mb_strtoupper($str);
+ else
+ return strtoupper($str);
+ }
}
?>
pgpcwsECyfums.pgp
Description: PGP signature
