Fix smokeping test for 2.1.1 isPermaLink="true" change (yeah, a little bit late,...

[pkg/blosxom.git] / blosxom.cgi

diff --git a/blosxom.cgi b/blosxom.cgi
index 06ca9f752d91e0afc004bbf93c25e3d5be111222..712b8e2bd4795984e9cb90d8af85a6c1530478d2 100755 (executable)
--- a/blosxom.cgi
+++ b/blosxom.cgi
@@ -2,7 +2,7 @@
 
 # Blosxom
 # Author: Rael Dornfest (2002-2003), The Blosxom Development Team (2005-2008)
-# Version: 2.1.0+dev ($Id: blosxom.cgi,v 1.80 2008/07/25 18:22:09 xtaran Exp $)
+# Version: 2.1.2 ($Id: blosxom.cgi,v 1.85 2008/10/02 01:09:41 xtaran Exp $)
 # Home/Docs/Licensing: http://blosxom.sourceforge.net/
 # Development/Downloads: http://sourceforge.net/projects/blosxom
 
@@ -91,7 +91,7 @@ use File::stat;
 use Time::Local;
 use CGI qw/:standard :netscape/;
 
-$version = "2.1.0";
+$version = "2.1.2";
 
 # Load configuration from $ENV{BLOSXOM_CONFIG_DIR}/blosxom.conf, if it exists
 my $blosxom_config;
@@ -142,20 +142,39 @@ my $fh = new FileHandle;
 );
 @num2month = sort { $month2num{$a} <=> $month2num{$b} } keys %month2num;
 
-# Use the stated preferred URL or figure it out automatically
-$url ||= url( -path_info => 1 );
-# Unescape %XX hex codes (from URI::Escape::uri_unescape)
-$url =~ s/%([0-9A-Fa-f]{2})/chr(hex($1))/eg;      
-$url =~ s/^included:/http:/ if $ENV{SERVER_PROTOCOL} eq 'INCLUDED';
-
-# NOTE: Since v3.12, it looks as if CGI.pm misbehaves for SSIs and
-# always appends path_info to the url. To fix this, we always
-# request an url with path_info, and always remove it from the end of the
-# string.
-my $pi_len = length $ENV{PATH_INFO};
-my $might_be_pi = substr( $url, -$pi_len );
-substr( $url, -length $ENV{PATH_INFO} ) = ''
-    if $might_be_pi eq $ENV{PATH_INFO};
+# Use the stated preferred URL or figure it out automatically. Set
+# $url manually in the config section above if CGI.pm doesn't guess
+# the base URL correctly, e.g. when called from a Server Side Includes
+# document or so.
+unless ($url) {
+    $url = url();
+
+    # Unescape %XX hex codes (from URI::Escape::uri_unescape)
+    $url =~ s/%([0-9A-Fa-f]{2})/chr(hex($1))/eg;      
+
+    # Support being called from inside a SSI document
+    $url =~ s/^included:/http:/ if $ENV{SERVER_PROTOCOL} eq 'INCLUDED';
+
+    # Remove PATH_INFO if it is set but not removed by CGI.pm. This
+    # seems to happen when used with Apache's Alias directive or if
+    # called from inside a Server Side Include document. If that
+    # doesn't help either, set $url manually in the configuration.
+    $url =~ s/\Q$ENV{PATH_INFO}\E$// if defined $ENV{PATH_INFO};
+
+    # NOTE:
+    #
+    # There is one case where this code does more than necessary, too:
+    # If the URL requested is e.g. http://example.org/blog/blog and
+    # the base URL is correctly determined as http://example.org/blog
+    # by CGI.pm, then this code will incorrectly normalize the base
+    # URL down to http://example.org, because the same string as
+    # PATH_INFO is part of the base URL, too. But this is such a
+    # seldom case and can be fixed by setting $url in the config file,
+    # too.
+}
+
+# The only modification done to a manually set base URL is to strip
+# a trailing slash if present.
 
 $url =~ s!/$!!;
 
@@ -195,6 +214,23 @@ if (! ($flavour = param('flav'))) {
 }
 $flavour ||= $default_flavour;
 
+# Fix XSS in flavour name (CVE-2008-2236)
+$flavour = blosxom_html_escape($flavour);
+
+sub blosxom_html_escape {
+  my $string = shift;
+  my %escape = (
+                '<' => '&lt;',
+                '>' => '&gt;',
+                '&' => '&amp;',
+                '"' => '&quot;',
+                "'" => '&apos;'
+                );
+  my $escape_re = join '|' => keys %escape;
+  $string =~ s/($escape_re)/$escape{$1}/g;
+  $string;
+}
+
 # Global variable to be used in head/foot.{flavour} templates
 $path_info = '';
 # Add all @path_info elements to $path_info till we come to one that could be a year
@@ -795,7 +831,7 @@ rss story     <title>$title</title>
 rss story     <pubDate>$dw, $da $mo $yr $ti:00 $utc_offset</pubDate>
 rss story     <link>$url/$yr/$mo_num/$da#$fn</link>
 rss story     <category>$path</category>
-rss story     <guid isPermaLink="true">$url$path/$fn</guid>
+rss story     <guid isPermaLink="false">$url$path/$fn</guid>
 rss story     <description>$body</description>
 rss story   </item>