From 62d12c332e6924b86742cf24046b237f1bea5244 Mon Sep 17 00:00:00 2001
From: David Cook <dcook@prosentient.com.au>
Date: Mon, 24 Jul 2023 04:31:15 +0000
Subject: [PATCH] Bug 34349: Validate/escape inputs for task scheduler

This change validates and escapes inputs for task scheduler.

Test plan:
0. Apply patch
1. koha-plack --reload kohadev
2. Go to http://localhost:8081/cgi-bin/koha/tools/scheduler.pl
3. Input a time a minute in the future and leave the date blank
4. Choose an existing report and output format
5. Type a malicious string which is also a valid email address
into the Email field
6. Click "Save"
7. Note that the job is added but the Email is wrapped in single
quotes
8. Try using a non-malicious email address with a single quote.
9. Note that the single quote is escaped, so that it will still
be used by runreport.pl

JD amended patch: tidy

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
---
 tools/scheduler.pl | 41 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 36 insertions(+), 5 deletions(-)

diff --git a/tools/scheduler.pl b/tools/scheduler.pl
index ecee48e930d..d7bf3a2ce9a 100755
--- a/tools/scheduler.pl
+++ b/tools/scheduler.pl
@@ -25,6 +25,8 @@ use C4::Auth qw( get_template_and_user );
 use CGI qw ( -utf8 );
 use C4::Output qw( output_html_with_http_headers );
 use Koha::DateUtils qw( dt_from_string );;
+use Koha::Reports;
+use Koha::Email;
 
 my $input = CGI->new;
 my $base;
@@ -60,11 +62,36 @@ if ( $mode eq 'job_add' ) {
     $starttime =~ s/\://g;
     my $start  = $startdate . $starttime;
     my $report = $input->param('report');
+    if ($report) {
+        my $saved_report;
+        my $report_id = int($report);
+        if ($report_id) {
+            $saved_report = Koha::Reports->find($report_id);
+        }
+        if ( !$saved_report ) {
+            $report = undef;
+        }
+    }
     my $format = $input->param('format');
-    my $email  = $input->param('email');
-    my $command =
-        "export KOHA_CONF=\"$CONFIG_NAME\"; " .
-        "$base/cronjobs/runreport.pl $report --format=$format --to=$email";
+    if ($format) {
+        unless ( $format eq 'text' || $format eq 'csv' || $format eq 'html' ) {
+            $format = undef;
+        }
+    }
+    my $email = $input->param('email');
+    if ($email) {
+        my $is_valid = Koha::Email->is_valid($email);
+        if ( !$is_valid ) {
+            $email = undef;
+        }
+    }
+    if ( $report && $format && $email ) {
+
+        #NOTE: Escape any single quotes in email since we're wrapping it in single quotes in bash
+        ($email) =~ s/'/'"'"'/g;
+        my $command =
+              "export KOHA_CONF=\"$CONFIG_NAME\"; "
+            . "$base/cronjobs/runreport.pl $report --format=$format --to='$email'";
 
 #FIXME commit ea899bc55933cd74e4665d70b1c48cab82cd1257 added recurring parameter (it is not in template) and call to add_cron_job (undefined)
 #    my $recurring = $input->param('recurring');
@@ -76,7 +103,11 @@ if ( $mode eq 'job_add' ) {
 #        #here was the the unless ( add_at_job
 #    }
 
-    unless ( add_at_job( $start, $command ) ) {
+        unless ( add_at_job( $start, $command ) ) {
+            $template->param( job_add_failed => 1 );
+        }
+    }
+    else {
         $template->param( job_add_failed => 1 );
     }
 }
-- 
2.25.1