Re: [BUG] gitweb: XSS vulnerability of RSS feed

[Andreas Schwab <schwab@linux-m68k.org>]

Drew Northup <n1xim.email@gmail.com> writes:

> Something like this may be useful to defuse the "file" parameter, but
> I presume a more definitive fix is in order...

A proper fix will have to add esc_html to the feed generation, something
like this (untested):

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 10ed9e5..a51a8ba 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -8055,6 +8055,7 @@ sub git_feed {
 		$feed_type = 'history';
 	}
 	$title .= " $feed_type";
+	$title = esc_html($title);
 	my $descr = git_get_project_description($project);
 	if (defined $descr) {
 		$descr = esc_html($descr);


Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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