Helpdesk Takeover at dmc.datastax.com

## Summary: DNS record [dmc.datastax.com](dmc.datastax.com) is pointing to stale [dmc-support.zendesk.com](dmc-support.zendesk.com) domain on Zendesk which is available for takeover. DNS Stale Records: {F661014} ## Proof of Concept: There was no helpdesk configured at this address, which means that the address was available and anyone could claim it. I was able to claim dmc-support.zendesk.com. On this page, https://dmc.datastax.com/hc/en-us I haven't made the page public, I'm attaching a screenshot of the webpage: {F661004} ## Supporting Material/References: Login page: {F661021} ## Impact Subdomain takeover