Usage of snmpenum - perl

Question

snmpenum.pl is introduced in many materials about penetration testing, although it's already a very ancient program.
I downloaded it from here.
And this is the problem I encountered.
$ perl snmpenum.pl 192.168.1.36 public linux.txt # official usage
----------------------------------------
SYSTEM INFO
----------------------------------------
" is expected in dotted decimal notation..1.2.1.1.1
I have no knowledge about Perl. Can anyone tell me whether there's a problem in linux.txt or where the real problem lies? Thanks.

Answer 1

I've been doing a little debugging of the snmpenum.pl script and the NEt::SNMP is doing fine, the problem is the way the script splits the values when reading the lines from the OID values file (linux.txt, windows.txt, cisco.txt).
SOLUTION:
If you add a \t at the end of each line in the windows.txt/linux.txt/cisco.txt file the script is working again!
I've found that if you replace the read OID value by a hardcoded string such as "1.3.6.1.2.1.1.5" (or whatever value you want) the Net::SNMP->session.get_bulk_request() query works.
my $result = $session-get_bulk_request(){
-callback => [\&table_cb, {}],
-maxrepetitions => 10,
-varbindlist => [$v]
};
With the hardcoded strings:
my $result = $session-get_bulk_request(){
-callback => [\&table_cb, {}],
-maxrepetitions => 10,
-varbindlist => ["1.3.6.1.2.1.1.5"]
};
So I went to see how the var $v is created, and it is read from the file and the code does a split based on the \t char, which is not present at the end of the line. So I assumed the last value will perhaps contain any bogus char ascii code from the end of the line (line feed or carriage return?):
while (<CONFIG>){
chomp $_;
my #system= split /\t+/,$_;
Finally I added a \t (Tab) at the end of the line on the windows.txt, linux,txt and cisco.txt files that are distributed with snmpenum.pl and all worked fine!. For ex with this:
for filename in $(ls *.txt); do perl -i -p -e 's/\r\n/\t\r\n/' ./$filename; done
The other solution would be to make a code modification for snmpenum.pl...
Cheers,
Morgan

Answer 2

The files containing the OID's that came with snmpenum (e.g. linux.txt) are in DOS format. Simply convert them to UNIX format (e.g. dos2unix) and it should work fine.