[Bug 1016643] Re: add-apt-repository downloads gpg key in an insecure fashion

[Mathew Hodson]

The code for add-apt-repository is in ppa.py from the software-
properties package not the apt package.

** No longer affects: software-properties (Ubuntu Hardy)

** No longer affects: apt (Ubuntu)

** No longer affects: apt (Ubuntu Hardy)

** No longer affects: apt (Ubuntu Precise)

** No longer affects: apt (Ubuntu Lucid)

** No longer affects: apt (Ubuntu Natty)

** No longer affects: apt (Ubuntu Oneiric)

** No longer affects: apt (Ubuntu Quantal)

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https://bugs.launchpad.net/bugs/1016643

Title:
  add-apt-repository downloads gpg key in an insecure fashion

Status in GnuPG:
  Fix Released
Status in gnupg package in Ubuntu:
  Fix Released
Status in gnupg2 package in Ubuntu:
  Fix Released
Status in software-properties package in Ubuntu:
  Fix Released
Status in gnupg source package in Lucid:
  Fix Released
Status in gnupg2 source package in Lucid:
  Fix Released
Status in software-properties source package in Lucid:
  Fix Released
Status in gnupg source package in Natty:
  Fix Released
Status in gnupg2 source package in Natty:
  Fix Released
Status in software-properties source package in Natty:
  Fix Released
Status in gnupg source package in Oneiric:
  Fix Released
Status in gnupg2 source package in Oneiric:
  Fix Released
Status in software-properties source package in Oneiric:
  Fix Released
Status in gnupg source package in Precise:
  Fix Released
Status in gnupg2 source package in Precise:
  Fix Released
Status in software-properties source package in Precise:
  Fix Released
Status in gnupg source package in Quantal:
  Fix Released
Status in gnupg2 source package in Quantal:
  Fix Released
Status in software-properties source package in Quantal:
  Fix Released
Status in gnupg source package in Hardy:
  Fix Released
Status in gnupg2 source package in Hardy:
  Fix Released

Bug description:
  add-apt-repository can add PPAs and automatically import the PPA gpg
  key.

  Unfortunately, it uses apt-key, which in turn uses gpg to download the
  key from a keyserver.

  gpg downloads keys from keyservers using the short key id, which is
  trivial to collide.

  It is therefore possible to either MITM the point where gpg downloads
  the key from the keyserver, or to simply upload a second colliding key
  to the keyserver. This can result in being able to MITM packages
  installed from PPAs.

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