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RDP: Add parsing and logging of channels requested by the client. Can determine capabilities requested by the client, as well as attacks such as CVE-2019-0708

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Vlad Grigorescu 2019-05-28 09:25:50 -05:00
parent d886f40728
commit 8eb14fcb83
6 changed files with 126 additions and 1 deletions
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17
scripts/base/protocols/rdp/main.zeek
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@ -23,6 +23,8 @@ export {
result: string &log &optional;
## Security protocol chosen by the server.
security_protocol: string &log &optional;
## The channels requested by the client
client_channels: vector of string &log &optional;
## Keyboard layout (language) of the client machine.
keyboard_layout: string &log &optional;
@ -189,6 +191,21 @@ event rdp_client_core_data(c: connection, data: RDP::ClientCoreData) &priority=5
c$rdp$requested_color_depth = RDP::high_color_depths[data$high_color_depth];
}
event rdp_client_network_data(c: connection, channels: ClientChannelList)
{
set_session(c);
if ( ! c$rdp?$client_channels )
{
c$rdp$client_channels = vector();
}
for (i in channels) {
# Remove the NULs at the end
c$rdp$client_channels[i] = gsub(channels[i]$name, /\x00+$/, "");
}
}
event rdp_gcc_server_create_response(c: connection, result: count) &priority=5
{
set_session(c);