Attachment 136290 Details for Bug 30969 – Bug 30969: Cross site scripting (XSS) attack in OPAC authority search ( opac-authorities-home.pl )

[patch] Bug 30969: Cross site scripting (XSS) attack in OPAC authority search ( opac-authorities-home.pl )

Bug-30969-Cross-site-scripting-XSS-attack-in-OPAC-.patch (text/plain), 1.66 KB, created by Martin Renvoize (ashimema) on 2022-06-17 14:19:18 UTC

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Creator: Martin Renvoize (ashimema)

Created: 2022-06-17 14:19:18 UTC

Size: 1.66 KB

patch

obsolete

>From 0e9354d6ce0a39d49eacd4a053987b157aa61411 Mon Sep 17 00:00:00 2001
>From: Kyle Hall <kyle@bywatersolutions.com>
>Date: Wed, 15 Jun 2022 12:06:55 -0400
>Subject: [PATCH] Bug 30969: Cross site scripting (XSS) attack in OPAC
> authority search ( opac-authorities-home.pl )
>
>There appears to be a cross site scripting attack vulnerability in opac-authorities-home.pl, but may be accessible from any page using C4::Output::pagination_bar.
>
>https://MYKOHA.LOCAL/cgi-bin/koha/opac-authorities-home.pl?and_or=and%27%22()%26%25%3Csad%3E%3CScRiPt%20%3Ealert(document.domain)%3C/ScRiPt%3E&authtypecode=CORPO_NAME&excluding=1&marclist=all&op=do_search&operator=contains&orderby=HeadingAsc&type=opac&value=1
>
>Test Plan:
>1) Use the URL above to show the XSS vulnerability exists
>2) Apply this patch
>3) Restart all the things!
>4) Reload the page, no XSS vulnerability!
>
>Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
>---
> C4/Output.pm | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
>diff --git a/C4/Output.pm b/C4/Output.pm
>index e36ec30bdc..42c4011ca0 100644
>--- a/C4/Output.pm
>+++ b/C4/Output.pm
>@@ -27,8 +27,9 @@ package C4::Output;
> 
> use Modern::Perl;
> 
>-use URI::Escape;
>+use HTML::Entities;
> use Scalar::Util qw( looks_like_number );
>+use URI::Escape;
> 
> use C4::Auth qw( get_template_and_user );
> use C4::Context;
>@@ -83,6 +84,8 @@ sub pagination_bar {
>     my $startfrom_name = (@_) ? shift : 'page';
>     my $additional_parameters = shift || {};
> 
>+    $base_url = HTML::Entities::encode($base_url);
>+
>     $current_page = looks_like_number($current_page) ? $current_page : undef;
>     $nb_pages     = looks_like_number($nb_pages)     ? $nb_pages     : undef;
> 
>-- 
>2.20.1

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Attachments on bug 30969: 136096 | 136289 | 136290 | 136662