Nmap Development mailing list archives
Re: [NSE] RPC library new version and scripts
From: Patrik Karlsson <patrik () cqure net>
Date: Tue, 16 Mar 2010 18:34:18 +0100
David, What are you running your tests against? Mac OS X? I've spent quite a lot of time testing this library and scripts, against different versions, mostly on Linux though. Looking at the information you sent I can see that the rpcinfo scripts show that portmap is running version 2 for both UDP and TCP. However, while looking at the packet captures, portmap answers with "remote can't support version 2" when queried over UDP. Not very logic if you ask me, but this explains why nothing is working over UDP. The statfs and acls scripts rely on being able to mount the actual nfs export which in your case fails with "rejected for security reasons". As the library currently only supports NULL authentication (ie. no authentication), there's not much to do about that. I guess it would be valuable to return some error messages from the scripts in order to prevent confusion though. I'll make the version column wider in order to handle the alignment problem your seeing. //Patrik On 16 mar 2010, at 17.18, David Fifield wrote:
On Sun, Mar 14, 2010 at 12:12:55PM +0100, Patrik Karlsson wrote:I just wrapped up the last few changes to the RPC library, which now looks very different than the last version. The library should now support communication with the mount and nfs programs using versions 1 through 3. Given the new OO-design I've tried to explain how to use the library (ie. what classes do). This documentation can be found at the top of rpc.lua. I've also tried to document as much of the known limitations as possible along with some explanations and sample code. I've renamed the scripts according to David's suggestion and added two more: - rpcinfo2.nse - produces the same output as rpcinfo.nse but using the rpc library instead - nfs-acls.nse - extract the owner, group and directory (acl) mode, like this: PORT STATE SERVICE REASON 111/tcp open rpcbind syn-ack | nfs-acls: | /home/patrik/tmp | uid: 1000; gid: 1000; mode: drwsr-Sr-x (6745) | /home/patrik | uid: 1000; gid: 1000; mode: drwxr-xr-x (755) | /tmp |_ uid: 0; gid: 0; mode: drwxrwxrwx (1777) As shown by the above output, the scripts are now using port rules instead of host rules. I don't know if this was a good change or not. Even though it makes the scripts simpler, the output will appear as if it was retrieved over port 111 (rpc), which it isn't.The only scripts that work for me are nfs-showmount and rpcinfo2, and those only work over TCP. The other scripts, and all script using UDP, produce no output. rpcinfo2 looks good except for an alignment problem in the third column. ./nmap --datadir . --script=rpcinfo,rpcinfo2 192.168.0.190 -d2 -Pn -p 111 -sSU PORT STATE SERVICE REASON 111/tcp open rpcbind syn-ack | rpcinfo: | 100000 2 111/udp rpcbind | 100005 1,3 697/udp mountd | 100024 1 782/udp status | 100011 1,2 860/udp rquotad | 100021 0,1,3,4 922/udp nlockmgr | 100003 2,3 2049/udp nfs | 100000 2 111/tcp rpcbind | 100021 0,1,3,4 1021/tcp nlockmgr | 100024 1 1022/tcp status | 100005 1,3 1023/tcp mountd |_100003 2,3 2049/tcp nfs | rpcinfo2: | 100000 2 111/tcp rpcbind | 100000 2 111/udp rpcbind | 100003 2,3 2049/tcp nfs | 100003 2,3 2049/udp nfs | 100005 1,3 697/udp mountd | 100005 1,3 1023/tcp mountd | 100011 1,2 860/udp rquotad | 100021 0,1,3,4 922/udp nlockmgr | 100021 0,1,3,4 1021/tcp nlockmgr | 100024 1 782/udp status |_ 100024 1 1022/tcp status 111/udp open rpcbind udp-response Here is the output of nfs-showmount. ./nmap --datadir . --script=nfs-showmount 192.168.0.190 -d2 -Pn -p 111 -sSU PORT STATE SERVICE REASON 111/tcp open rpcbind syn-ack | nfs-showmount: |_ /Users/david 111/udp open rpcbind udp-response nfs-dirlist, nfs-statfs, and nfs-acls all look like this. PORT STATE SERVICE REASON 111/tcp open rpcbind syn-ack 111/udp open rpcbind udp-response These three scripts are getting partial results, but they are being thrown away. Instead of returning nil from action on any error, it would be better to insert an error message in the output. If I add error reporting to nfs-statfs, I get this output: PORT STATE SERVICE REASON 111/tcp open rpcbind syn-ack | nfs-statfs: | /Users/david |_ ERROR: rpc.Helper.ExportStats: mount failed I'm going to attach packet captures of nfs-showmount and nfs-statfs with TCP and UDP. What else can I do to help? David Fifield <nfs-showmount-tcp.pcap><nfs-showmount-udp.pcap><nfs-statfs-tcp.pcap><nfs-statfs-udp.pcap>_______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
-- Patrik Karlsson http://www.cqure.net http://www.twitter.com/nevdull77 _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
Current thread:
- [NSE] RPC library new version and scripts Patrik Karlsson (Mar 14)
- Re: [NSE] RPC library new version and scripts David Fifield (Mar 16)
- Re: [NSE] RPC library new version and scripts Patrik Karlsson (Mar 16)
- Re: [NSE] RPC library new version and scripts Patrik Karlsson (Mar 16)
- Re: [NSE] RPC library new version and scripts Patrik Karlsson (Mar 16)
- Re: [NSE] RPC library new version and scripts David Fifield (Mar 17)
- Re: [NSE] RPC library new version and scripts Patrik Karlsson (Mar 21)
- Re: [NSE] RPC library new version and scripts David Fifield (Mar 16)