keybase / keybase/client

DNS proof instructions unsafe

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#9,512 3 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Go
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Description

Yesterday I tried to proof I own grons.nl. The app (Mac 1.0.34-20171027003854+8e989533a) instructs to create a DNS record named grons.nl. and if that wouldn't work a record named @.

Too late I realized that I already have a record grons.nl. for the SPF configuration. That record was then overwritten by my DNS provider.

In the second attempt, @ as name was ignored by my DNS provider. So it again created a record named grons.nl..

May I suggest that the record be named _keybase.[domain].? This is more in line with what dmarc and domainkeys are doing.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the DNS proof flow that produces the Mac app's record-name instructions, using the reported grons.nl. and @ cases as reproduction targets. Verify that the guidance uses a dedicated _keybase.[domain]. record and does not overwrite an existing SPF record; add or update coverage for both provider behaviors.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
authentication, security
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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