From 037af6890fe6fdb84a08d3c86083e847c90ec0ad Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 22 Oct 2013 08:17:26 -0400
Subject: [PATCH] Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)
---
program/lib/Roundcube/rcube_string_replacer.php | 35 ++++++++++++++++++++++++++++++-----
1 files changed, 30 insertions(+), 5 deletions(-)
diff --git a/program/lib/Roundcube/rcube_string_replacer.php b/program/lib/Roundcube/rcube_string_replacer.php
index 0fe982b..bd26f8e 100644
--- a/program/lib/Roundcube/rcube_string_replacer.php
+++ b/program/lib/Roundcube/rcube_string_replacer.php
@@ -34,11 +34,11 @@
{
// Simplified domain expression for UTF8 characters handling
// Support unicode/punycode in top-level domain part
- $utf_domain = '[^?&@"\'\\/()\s\r\t\n]+\\.?([^\\x00-\\x2f\\x3b-\\x40\\x5b-\\x60\\x7b-\\x7f]{2,}|xn--[a-zA-Z0-9]{2,})';
+ $utf_domain = '[^?&@"\'\\/()<>\s\r\t\n]+\\.?([^\\x00-\\x2f\\x3b-\\x40\\x5b-\\x60\\x7b-\\x7f]{2,}|xn--[a-zA-Z0-9]{2,})';
$url1 = '.:;,';
- $url2 = 'a-zA-Z0-9%=#$@+?!&\\/_~\\[\\]{}\*-';
+ $url2 = 'a-zA-Z0-9%=#$@+?|!&\\/_~\\[\\]\\(\\){}\*-';
- $this->link_pattern = "/([\w]+:\/\/|\W[Ww][Ww][Ww]\.|^[Ww][Ww][Ww]\.)($utf_domain([$url1]?[$url2]+)*)/";
+ $this->link_pattern = "/([\w]+:\/\/|\W[Ww][Ww][Ww]\.|^[Ww][Ww][Ww]\.)($utf_domain([$url1]*[$url2]+)*)/";
$this->mailto_pattern = "/("
."[-\w!\#\$%&\'*+~\/^`|{}=]+(?:\.[-\w!\#\$%&\'*+~\/^`|{}=]+)*" // local-part
."@$utf_domain" // domain-part
@@ -89,7 +89,7 @@
if ($url) {
$suffix = $this->parse_url_brackets($url);
- $i = $this->add($prefix . html::a(array(
+ $i = $this->add(html::a(array(
'href' => $url_prefix . $url,
'target' => '_blank'
), rcube::Q($url)) . $suffix);
@@ -97,7 +97,7 @@
// Return valid link for recognized schemes, otherwise
// return the unmodified string for unrecognized schemes.
- return $i >= 0 ? $this->get_replacement($i) : $matches[0];
+ return $i >= 0 ? $prefix . $this->get_replacement($i) : $matches[0];
}
/**
@@ -161,6 +161,9 @@
// "http://example.com/?a[b]=c". However we need to handle
// properly situation when a bracket is placed at the end
// of the link e.g. "[http://example.com]"
+ // Yes, this is not perfect handles correctly only paired characters
+ // but it should work for common cases
+
if (preg_match('/(\\[|\\])/', $url)) {
$in = false;
for ($i=0, $len=strlen($url); $i<$len; $i++) {
@@ -182,6 +185,28 @@
}
}
+ // Do the same for parentheses
+ if (preg_match('/(\\(|\\))/', $url)) {
+ $in = false;
+ for ($i=0, $len=strlen($url); $i<$len; $i++) {
+ if ($url[$i] == '(') {
+ if ($in)
+ break;
+ $in = true;
+ }
+ else if ($url[$i] == ')') {
+ if (!$in)
+ break;
+ $in = false;
+ }
+ }
+
+ if ($i < $len) {
+ $suffix = substr($url, $i);
+ $url = substr($url, 0, $i);
+ }
+ }
+
return $suffix;
}
}
--
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