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Fixed insertion of nested subnets.

Browse source 
When inserting, existance of the given subnet is checked using exact
matching instead of longest prefix matching. Before, inserting a subnet
would have updated the subnet item, which is the longest prefix of the
inserted subnet, if present.
This commit is contained in:
Jan Grashoefer 2016-06-22 21:14:06 +02:00
parent 1412de1798
commit df5d9adfb4
3 changed files with 9 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

2
scripts/base/frameworks/intel/main.bro
View file

@ -393,7 +393,7 @@ function insert(item: Item)
local net = to_subnet(item$indicator);
if ( have_full_data )
{
if ( net !in data_store$subnet_data )
if ( !check_subnet(net, data_store$subnet_data) )
data_store$subnet_data[net] = table();
else
is_new = F;

11
testing/btest/Baseline/scripts.base.frameworks.intel.match-subnet/output
View file

@ -3,13 +3,13 @@
#empty_field (empty)
#unset_field -
#path intel
#open 2016-06-15-19-14-07
#open 2016-06-22-19-12-08
#fields ts uid id.orig_h id.orig_p id.resp_h id.resp_p seen.indicator seen.indicator_type seen.where seen.node matched sources fuid file_mime_type file_desc
#types time string addr port addr port string enum enum string set[enum] set[string] string string string
1466018047.083068 - - - - - 192.168.1.1 Intel::ADDR SOMEWHERE bro Intel::ADDR source1 - - -
1466018047.083068 - - - - - 192.168.2.1 Intel::ADDR SOMEWHERE bro Intel::SUBNET source1 - - -
1466018047.083068 - - - - - 192.168.142.1 Intel::ADDR SOMEWHERE bro Intel::ADDR,Intel::SUBNET source1 - - -
#close 2016-06-15-19-14-07
1466622728.846581 - - - - - 192.168.1.1 Intel::ADDR SOMEWHERE bro Intel::ADDR source1 - - -
1466622728.846581 - - - - - 192.168.2.1 Intel::ADDR SOMEWHERE bro Intel::SUBNET source1 - - -
1466622728.846581 - - - - - 192.168.142.1 Intel::ADDR SOMEWHERE bro Intel::ADDR,Intel::SUBNET source1 - - -
#close 2016-06-22-19-12-08
Seen: [indicator=192.168.1.1, indicator_type=Intel::ADDR, host=192.168.1.1, where=SOMEWHERE, node=bro, conn=<uninitialized>, uid=<uninitialized>, f=<uninitialized>, fuid=<uninitialized>]
Item: [indicator=192.168.1.1, indicator_type=Intel::ADDR, meta=[source=source1, desc=this host is just plain baaad, url=http://some-data-distributor.com/1]]
@ -18,6 +18,7 @@ Seen: [indicator=192.168.2.1, indicator_type=Intel::ADDR, host=192.168.2.1, wher
Item: [indicator=192.168.2.0/24, indicator_type=Intel::SUBNET, meta=[source=source1, desc=this subnetwork is just plain baaad, url=http://some-data-distributor.com/2]]
Seen: [indicator=192.168.142.1, indicator_type=Intel::ADDR, host=192.168.142.1, where=SOMEWHERE, node=bro, conn=<uninitialized>, uid=<uninitialized>, f=<uninitialized>, fuid=<uninitialized>]
Item: [indicator=192.168.142.0/26, indicator_type=Intel::SUBNET, meta=[source=source1, desc=this subnetwork is inside, url=http://some-data-distributor.com/4]]
Item: [indicator=192.168.142.0/24, indicator_type=Intel::SUBNET, meta=[source=source1, desc=this subnetwork is baaad, url=http://some-data-distributor.com/4]]
Item: [indicator=192.168.142.1, indicator_type=Intel::ADDR, meta=[source=source1, desc=this host is just plain baaad, url=http://some-data-distributor.com/3]]
Item: [indicator=192.168.128.0/18, indicator_type=Intel::SUBNET, meta=[source=source1, desc=this subnetwork might be baaad, url=http://some-data-distributor.com/5]]

1
testing/btest/scripts/base/frameworks/intel/match-subnet.bro
View file

@ -10,6 +10,7 @@
192.168.2.0/24 Intel::SUBNET source1 this subnetwork is just plain baaad http://some-data-distributor.com/2
192.168.142.1 Intel::ADDR source1 this host is just plain baaad http://some-data-distributor.com/3
192.168.142.0/24 Intel::SUBNET source1 this subnetwork is baaad http://some-data-distributor.com/4
192.168.142.0/26 Intel::SUBNET source1 this subnetwork is inside http://some-data-distributor.com/4
192.168.128.0/18 Intel::SUBNET source1 this subnetwork might be baaad http://some-data-distributor.com/5
# @TEST-END-FILE