Vettel said: "There is nothing to tell, nothing I have signed. It is amusing. I don't know where it came from."
Vettel was dismissive of the claim and said he was concerned it could have caused problems at Red Bull.
"There is nothing to report and I am very happy at Red Bull Racing," he said.
His response was to a question as to whether he had any arrangement, or had had any talks, with Ferrari about his future.
Red Bull team principal Christian Horner says the team have a binding contract with Vettel to the end of 2014 and told BBC Sport: "Sebastian Vettel without a shadow of doubt, will be part of the Red Bull Racing team in 2014."
India win was not easy - Vettel
Ferrari sources continue to insist that there is an arrangement in place between the Italian team and Vettel with a view to him joining them.
They are not clear on the exact details but they say Vettel's long-term future will be at Ferrari.
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