Bro plugin to check if certificates are affected by CVE-2017-15361
Johanna::ROCA
=============
This plugin implements detection of CVE-2017-15361 keys; it is a
reimplementation of the source available at
https://github.com/crocs-muni/roca.
This plugin provides two new BIFs that can check public keys:
* `roca_vulnerable_cert` checks if a certificate is vulnerable
* `roca_vulnerable_mod` checks if a modulus is vulerable.
This plugin also ships with a script that is automatically loaded
and can notify you when CVE-2017-15361 are encountered on the wire.
To enable this, set:
```
redef ROCA::Notify=T;
```
Afterwards you should get notice.log entries when such keys are encountered.
Example:
```
#separator \x09
#set_separator ,
#empty_field (empty)
#unset_field -
#path notice
#open 2017-10-25-00-59-28
#fields ts uid id.orig_h id.orig_p id.resp_h id.resp_p fuid file_mime_type file_desc proto note msg sub src dst p n peer_descr actions suppress_for dropped remote_location.country_code remote_location.region remote_location.city remote_location.latitude remote_location.longitude
#types time string addr port addr port string string string enum enum string string addr addr port count string set[enum] interval bool string string string double double
1449265638.475275 CHhAvVGS1DHFjwGM9 192.168.6.74 52122 104.236.167.107 4433 Fvv5qY2DMGQY2MYQ03 application/x-x509-user-cert 104.236.167.107:4433/tcp tcp ROCA::CVE_2017_15361_KEY Certificate uses a key potentially affected by CVE-2017-15361 - 192.168.6.74 104.236.167.107 4433 - bro Notice::ACTION_LOG 86400.000000 F - - - - -
#close 2017-10-25-00-59-28
```
Installation
------------
This plugin requires GMP (The GNU MP Bugnum Library) to be installed on the
system. If this is the case, you should be able to install it using bro-pkg
using:
```
bro-pkg install 0xxon/bro-plugin-roca
```
If you have to specify the path to gmp, you can manually clone the repository
and install it using:
```
./configure --with-gmp=[directory]
make install
```
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