Before I start describing details, you have to know that this post is published on Responsible Disclosure terms. I sent a full report with all the findings to DASAN on 24th October 2017. We have been talking about these vulnerabilities for a long time, and one day they just stopped contacting me anymore (even when I warned them that I want to disclose this). Today is 26th April 2018, so it’s over half year after DASAN has been informed.