Nmap http-exif-spider NSE Script


This page contains detailed information about how to use the http-exif-spider NSE script. For list of all NSE scripts, visit the Nmap NSE Library.

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Overview
Error Messages

Script Overview

Script source code: https://github.com/nmap/nmap/tree/master/scripts/http-exif-spider.nse
Script categories: intrusive
Target service / protocol: http, https
Target network port(s): 80, 443, 631, 7080, 8080, 8443, 8088, 5800, 3872, 8180, 8000
List of CVEs: -

Script Description

The http-exif-spider.nse script spiders a site's images looking for interesting exif data embedded in .jpg files. Displays the make and model of the camera, the date the photo was taken, and the embedded geotag information.

Http-exif-spider NSE Script Arguments

This is a full list of arguments supported by the http-exif-spider.nse script:

http-exif-spider.url

The url to start spidering. This is a URL relative to the scanned host eg. /default.html (default: /)

smbdomain

The domain to log in with. If you aren't in a domain environment, then anything will (should?) be accepted by the server.

smbhash

A password hash to use when logging in. This is given as a single hex string (32 characters) or a pair of hex strings (both 32 characters, optionally separated by a single character). These hashes are the LanMan or NTLM hash of the user's password, and are stored on disk or in memory. They can be retrieved from memory using the fgdump or pwdump tools.

smbnoguest

Use to disable usage of the 'guest' account.

smbpassword

The password to connect with. Be cautious with this, since some servers will lock accounts if the incorrect password is given. Although it's rare that the Administrator account can be locked out, in the off chance that it can, you could get yourself in trouble. To use a blank password, leave this parameter off altogether.

smbtype

The type of SMB authentication to use. These are the possible options:

  • v1: Sends LMv1 and NTLMv1.
  • LMv1: Sends LMv1 only.
  • NTLMv1: Sends NTLMv1 only (default).
  • v2: Sends LMv2 and NTLMv2.
  • LMv2: Sends LMv2 only.
  • NTLMv2: Doesn't exist; the protocol doesn't support NTLMv2 alone. The default, NTLMv1, is a pretty decent compromise between security and compatibility. If you are paranoid, you might want to use v2 or lmv2 for this. (Actually, if you're paranoid, you should be avoiding this protocol altogether!). If you're using an extremely old system, you might need to set this to v1 or lm, which are less secure but more compatible. For information, see smbauth.lua.

smbusername

The SMB username to log in with. The forms "DOMAIN\username" and "username@DOMAIN" are not understood. To set a domain, use the smbdomain argument.

slaxml.debug

Debug level at which default callbacks will print detailed parsing info. Default: 3

http.host

The value to use in the Host header of all requests unless otherwise set. By default, the Host header uses the output of stdnse.get_hostname().

http.max-body-size

Limit the received body to specific number of bytes. An oversized body results in an error unless script argument http.truncated-ok or request option truncated_ok is set to true. The default is 2097152 (2MB). Use value -1 to disable the limit altogether. This argument can be overridden case-by-case with request option max_body_size.

http.max-cache-size

The maximum memory size (in bytes) of the cache.

http.max-pipeline

If set, it represents the number of outstanding HTTP requests that should be sent together in a single burst. Defaults to http.pipeline (if set), or to what function get_pipeline_limit returns.

http.pipeline

If set, it represents the number of HTTP requests that'll be sent on one connection. This can be set low to make debugging easier, or it can be set high to test how a server reacts (its chosen max is ignored).

http.truncated-ok

Do not treat oversized body as error. (Use response object flag truncated to check if the returned body has been truncated.) This argument can be overridden case-by-case with request option truncated_ok.

http.useragent

The value of the User-Agent header field sent with requests. By default it is "Mozilla/5.0 (compatible; Nmap Scripting Engine; https://nmap.org/book/nse.html)". A value of the empty string disables sending the User-Agent header field.

- - -
To use these script arguments, add them to the Nmap command line using the --script-args arg1=value,[arg2=value,..] syntax. For example:

nmap --script=http-exif-spider --script-args http-exif-spider.url=value,smbdomain=value <target>

Http-exif-spider NSE Script Example Usage

Here's an example of how to use the http-exif-spider.nse script:

nmap --script http-exif-spider -p80,443 <host>

Http-exif-spider NSE Script Example Output

Here's a sample output from the http-exif-spider.nse script:

PORT   STATE SERVICE REASON
80/tcp open  http    syn-ack
| http-exif-spider:
|   http://www.javaop.com/Nationalmuseum.jpg
|     Make: Canon
|     Model: Canon PowerShot S100\xB4
|     Date: 2003:03:29 13:35:40
|   http://www.javaop.com/topleft.jpg
|_    GPS: 49.941250,-97.206189 - https://maps.google.com/maps?q=49.94125,-97.20618863493

Http-exif-spider NSE Script Example XML Output

There is no sample XML output for this module. However, by providing the -oX <file> option, Nmap will produce a XML output and save it in the file.xml file.

Author

  • Ron Bowes

References

See Also

Visit Nmap NSE Library for more scripts.

The http-exif-spider.nse script may fail with the following error messages. Check for the possible causes by using the code snippets highlighted below found in the script source code. This can often times help in identifying the root cause of the problem.

Invalid EXIF header

Here is a relevant code snippet related to the "Invalid EXIF header" error message:

402:	  result = {}
403:	
404:	  -- Read the verify the EXIF header
405:	  local header, endian, pos = string.unpack(">c6 I2", exif_data, 1)
406:	  if(header ~= "Exif\0\0") then
407:	    return false, "Invalid EXIF header"
408:	  end
409:	
410:	  -- Check the endianness - it should only ever be big endian, but it doesn't
411:	  -- hurt to check
412:	  if(endian == 0x4d4d) then

Unrecognized endianness entry

Here is a relevant code snippet related to the "Unrecognized endianness entry" error message:

412:	  if(endian == 0x4d4d) then
413:	    endian = ">"
414:	  elseif(endian == 0x4949) then
415:	    endian = "<"
416:	  else
417:	    return false, "Unrecognized endianness entry"
418:	  end
419:	
420:	  -- Read the first tiff header and the offset to the first data entry (should be 8)
421:	  tiff_header_1, first_offset, pos = string.unpack(endian .. "I2 I4", exif_data, pos)
422:	  if(tiff_header_1 ~= 0x002A or first_offset ~= 0x00000008) then

Invalid tiff header

Here is a relevant code snippet related to the "Invalid tiff header" error message:

418:	  end
419:	
420:	  -- Read the first tiff header and the offset to the first data entry (should be 8)
421:	  tiff_header_1, first_offset, pos = string.unpack(endian .. "I2 I4", exif_data, pos)
422:	  if(tiff_header_1 ~= 0x002A or first_offset ~= 0x00000008) then
423:	    return false, "Invalid tiff header"
424:	  end
425:	
426:	  -- Skip over the header, and go to the first offset (subtracting 1 because lua)
427:	  pos = first_offset + 8 - 1
428:

Unexpected signature

Here is a relevant code snippet related to the "Unexpected signature" error message:

461:	  local pos, sig, marker, size, exif_data
462:	
463:	  -- Parse the jpeg header, make sure it's valid (we expect 0xFFD8)
464:	  sig, pos = string.unpack(">I2", s, pos)
465:	  if(sig ~= 0xFFD8) then
466:	    return false, "Unexpected signature"
467:	  end
468:	
469:	  -- Parse the sections to find the exif marker (0xffe1)
470:	  while(true) do
471:	    marker, size, pos = string.unpack(">I2I2", s, pos)

Could not found EXIF marker

Here is a relevant code snippet related to the "Could not found EXIF marker" error message:

473:	    -- Check if we found the exif metadata section, break if we did
474:	    if(marker == 0xffe1) then
475:	      break
476:	    -- If the marker is nil, we're off the end of the image (and therefore, it wasn't found)
477:	    elseif(not(marker)) then
478:	      return false, "Could not found EXIF marker"
479:	    end
480:	
481:	    -- Go to the next section (we subtract 2 because of the 2-byte marker we read)
482:	    pos = pos + size - 2
483:	  end

Version

This page has been created based on Nmap version 7.92.

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