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o [NSE] Added snmpWalk function to SNMP library and updated scripts to use it

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[Patrik]
This commit is contained in:
patrik
2010-04-12 10:30:24 +00:00
parent a9c5d3391c
commit 112f8f5340
9 changed files with 128 additions and 355 deletions
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3
CHANGELOG
View File

@@ -1,5 +1,8 @@
# Nmap Changelog ($Id$); -*-text-*-
o [NSE] Added snmpWalk function to SNMP library and updated scripts to use it
[Patrik]
o Updated IANA IP address space assignment list for random IP (-iR)
generation. [Kris]

57
nselib/snmp.lua
View File

@@ -489,3 +489,60 @@ function fetchFirst(response)
return nil
end
end
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return status true on success, false on failure
-- @return table containing <code>oid</code> and <code>value</code>
function snmpWalk( socket, base_oid )
local snmp_table = {}
local oid = base_oid
local status, err, payload
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
status, err = socket:send(payload)
if ( not( status ) ) then
stdnse.print_debug("snmp.snmpWalk: Send failed")
return false, err
end
status, response = socket:receive_bytes(1)
if ( not( status ) ) then
-- Unless we don't have a usefull error message, don't report it
if ( response ~= "ERROR" ) then
stdnse.print_debug("snmp.snmpWalk: Received no answer (%s)", response)
return false, response
end
return false, nil
end
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
snmp_table.baseoid = base_oid
return true, snmp_table
end

58
scripts/snmp-interfaces.nse
View File

@@ -19,7 +19,8 @@ dependencies = {"snmp-brute"}
-- code borrowed heavily from Patrik Karlsson's excellent snmp scripts
-- Created 03/03/2010 - v0.1 - created by Thomas Buchanan <tbuchanan@thecompassgrp.net>
-- 03/05/2010 - v0.2 - Reworked output slighty, moved iana_types to script scope. Suggested by David Fifield
-- Revised 03/05/2010 - v0.2 - Reworked output slighty, moved iana_types to script scope. Suggested by David Fifield
-- Revised 04/11/2010 - v0.2 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
@@ -70,51 +71,6 @@ local iana_types = { "other", "regular1822", "hdh1822", "ddnX25", "rfc877x25", "
"x86Laps", "wwanPP", "wwanPP2", "voiceEBS", "ifPwType", "ilan", "pip", "aluELP", "gpon",
"vdsl2", "capwapDot11Profile", "capwapDot11Bss", "capwapWtpVirtualRadio" }
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -396,14 +352,16 @@ action = function(host, port)
local ip_oid = "1.3.6.1.2.1.4.20"
local interfaces = {}
local ips = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
-- retreive network interface information from IF-MIB
interfaces = snmp_walk( socket, if_oid )
status, interfaces = snmp.snmpWalk( socket, if_oid )
socket:close()
if ( interfaces == nil ) or ( #interfaces == 0 ) then
if (not(status)) or ( interfaces == nil ) or ( #interfaces == 0 ) then
return
end
@@ -414,10 +372,10 @@ action = function(host, port)
-- retreive IP address information from IP-MIB
try(socket:connect(host.ip, port.number, "udp"))
ips = snmp_walk( socket, ip_oid )
status, ips = snmp.snmpWalk( socket, ip_oid )
-- associate that IP address information with the correct interface
if ( ips ~= nil ) and ( #ips ~= 0 ) then
if (not(status)) or ( ips ~= nil ) and ( #ips ~= 0 ) then
interfaces = process_ips( interfaces, ips )
end

83
scripts/snmp-netstat.nse
View File

@@ -22,49 +22,31 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.1
-- Version 0.2
-- Created 01/19/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 04/11/2010 - v0.2 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--- Processes the table and creates the script output
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @param prefix string containing either "UDP" or "TCP"
-- @param base_oid string containing the value of the base_oid of the walk
-- @return table suitable for <code>stdnse.format_output</code>
function process_answer( tbl, prefix, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local new_tab = {}
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
local lip = oid:match( "^" .. base_oid .. "%.(%d+%.%d+%.%d+%.%d+)") or ""
local lport = oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.(%d+)")
local fip = oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+%.%d+%.%d+%.%d+)") or "*:*"
local fport = oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+)")
for _, v in ipairs( tbl ) do
local lip = v.oid:match( "^" .. base_oid .. "%.(%d+%.%d+%.%d+%.%d+)") or ""
local lport = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.(%d+)")
local fip = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+%.%d+%.%d+%.%d+)") or "*:*"
local fport = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+)")
local value
if lport and lport ~= "0" then
lip = lip .. ":" .. lport
@@ -76,30 +58,7 @@ function snmp_walk( socket, base_oid )
value = string.format("%-20s %s", lip, fip )
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
snmp_table.baseoid = base_oid
return snmp_table
end
--- Processes the table and creates the script output
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @return table suitable for <code>stdnse.format_output</code>
function process_answer( tbl, prefix )
local new_tab = {}
for _, v in ipairs( tbl ) do
table.insert( new_tab, string.format( "%-4s %s", prefix, v.value ) )
table.insert( new_tab, string.format( "%-4s %s", prefix, value ) )
end
return new_tab
@@ -122,19 +81,21 @@ action = function(host, port)
local tcp_oid = "1.3.6.1.2.1.6.13.1.1"
local udp_oid = "1.3.6.1.2.1.7.5.1.1"
local netstat = {}
local status, tcp, udp
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
local tcp = snmp_walk( socket, tcp_oid )
local udp = snmp_walk( socket, udp_oid )
status, tcp = snmp.snmpWalk( socket, tcp_oid )
status, udp = snmp.snmpWalk( socket, udp_oid )
socket:close()
if ( tcp == nil ) or ( #tcp == 0 ) or ( udp==nil ) or ( #udp == 0 ) then
return
end
tcp = process_answer(tcp, "TCP")
udp = process_answer(udp, "UDP")
tcp = process_answer(tcp, "TCP", tcp_oid)
udp = process_answer(udp, "UDP", udp_oid)
netstat = table_merge( tcp, udp )
nmap.set_port_state(host, port, "open")

56
scripts/snmp-processes.nse
View File

@@ -30,61 +30,17 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.3
-- Version 0.4
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
-- Revised 01/19/2010 - v0.2 - removed debugging output and renamed file
-- Revised 01/19/2010 - v0.3 - removed debugging output and renamed file
-- Revised 04/11/2010 - v0.4 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -157,13 +113,15 @@ action = function(host, port)
local try = nmap.new_try(catch)
local data, snmpoid = nil, "1.3.6.1.2.1.25.4.2"
local shares = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
shares = snmp_walk( socket, snmpoid )
status, shares = snmp.snmpWalk( socket, snmpoid )
socket:close()
if ( shares == nil ) or ( #shares == 0 ) then
if (not(status)) or ( shares == nil ) or ( #shares == 0 ) then
return
end

53
scripts/snmp-win32-services.nse
View File

@@ -24,59 +24,16 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.2
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
-- Revised 04/11/2010 - v0.3 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Processes the table and creates the script output
--
@@ -103,13 +60,15 @@ action = function(host, port)
local try = nmap.new_try(catch)
local snmpoid = "1.3.6.1.4.1.77.1.2.3.1.1"
local services = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
services = snmp_walk( socket, snmpoid )
status, services = snmp.snmpWalk( socket, snmpoid )
socket:close()
if ( services == nil ) or ( #services == 0 ) then
if ( not(status) ) or ( services == nil ) or ( #services == 0 ) then
return
end

55
scripts/snmp-win32-shares.nse
View File

@@ -17,60 +17,16 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.2
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
-- Revised 04/11/2010 - v0.3 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -127,10 +83,11 @@ action = function(host, port)
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
shares = snmp_walk( socket, snmpoid )
status, shares = snmp.snmpWalk( socket, snmpoid )
socket:close()
if ( shares == nil ) or ( #shares == 0 ) then
return
if (not(status)) or ( shares == nil ) or ( #shares == 0 ) then
return shares
end
shares = process_answer( shares )

55
scripts/snmp-win32-software.nse
View File

@@ -18,61 +18,16 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.2
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
-- Revised 04/11/2010 - v0.3 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -128,13 +83,15 @@ action = function(host, port)
local try = nmap.new_try(catch)
local data, snmpoid = nil, "1.3.6.1.2.1.25.6.3.1"
local sw = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
sw = snmp_walk( socket, snmpoid )
status, sw = snmp.snmpWalk( socket, snmpoid )
socket:close()
if ( sw == nil ) or ( #sw == 0 ) then
if ( not(status) ) or ( sw == nil ) or ( #sw == 0 ) then
return
end

57
scripts/snmp-win32-users.nse
View File

@@ -21,60 +21,16 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.2
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
-- Revised 04/11/2010 - v0.3 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @param base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Processes the table and creates the script output
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
@@ -100,11 +56,18 @@ action = function(host, port)
local try = nmap.new_try(catch)
local snmpoid = "1.3.6.1.4.1.77.1.2.25"
local users = {}
local status
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
users = snmp_walk( socket, snmpoid )
status, users = snmp.snmpWalk( socket, snmpoid )
socket:close()
if( not(status) ) then
return
end
users = process_answer( users )
if ( users == nil ) or ( #users == 0 ) then