Sorry, I meant that after this line of code:

These variables appear to be empty, so there is no output.

Here's the code with some fixed typos and with error checking.

#!/usr/bin/perl -w

use strict;

use Text::CSV_XS qw( );

@ARGV == 1
   or die("usage: $0 id\n");

my ($query_id) = @ARGV;

my $csv = Text::CSV_XS->new();

my $query_cve_id;
{
   my $map_qfn = 'vuln_cve_map.csv';
   open(my $map_fh, '<', $map_qfn)
      or die("Can't open mapping file \"$map_qfn\": $!\n");

   while (my $row = $csv->getline($map_fh)) {
      my ($id, $cve_id) = @$row;
      if ($id == $query_id) {
         $query_cve_id = $cve_id;
         last;
      }
   }

   if ($csv->error_diag()) {
      die("Can't parse mapping file: ", $csv->error_diag(), "\n");
   }
}

{
   my $summary_qfn = 'CVE_summary.csv';
   open(my $summary_fh, '<', $summary_qfn)
      or die("Can't open CVE Summary file \"$summary_qfn\": $!\n");

   while (my $row = $csv->getline($summary_fh)) {
      my ($cve_id, $summary) = @$row;
      if ($cve_id == $query_cve_id) {
         print("[$cve_id] $summary\n");
         last;
      }
   }

   if ($csv->error_diag()) {
      die("Can't parse CVE Summary file: ", $csv->error_diag(), "\n");
   }
}
[download]

Running it yields

Can't parse CVE Summary file: 2021EIQ - NL char inside quotes, binary 
+off58
[download]

Your data is bad.

"CVE-1999-0095","The debug command in Sendmail is enabled
                                                         ^
                                                         |
                                                      missing
                                                      closing
                                                       quote
[download]

It was...

I re-generated the CVE/description file, changed the field separator to a pipe, changed the "==" to an "eq" since the CVE identifier in not numeric, and it works perfectly.

I'd like to thank you again for taking the time to walk me through this.

Hopefully it won't be too long before I can be on the other end, helping someone else.


Thanks again!


Scott...