[Bug 857472] Re: net-update verifcation checking insecure

[Marc Deslauriers]

There is also another scenario we should test for. If we decide to add a
key to the downloaded keyring, an attacker could then add a duplicate
key id for the new key in the spoofed keyring. I'm not sure what gpg
would do in that scenario, which key would get parsed first, etc.

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Title:
  net-update verifcation checking insecure

Status in “apt” package in Ubuntu:
  Confirmed
Status in “apt” source package in Oneiric:
  Confirmed

Bug description:
  From:
  http://seclists.org/fulldisclosure/2011/Sep/222

  its easy to bypass the verification checking in apt-key net-update.

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