[Bug 1034834] Re: Captive WiFi portals corrupt package lists

[Paul F]

See also Bug #1034834

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Title:
  Captive WiFi portals corrupt package lists

Status in “apt” package in Ubuntu:
  Confirmed

Bug description:
  I've dealt with several users reporting apt is broken. The cause is
  corrupted package lists in /var/lib/apt/lists/ caused by captive
  portals on WiFi networks that are returning HTTP 200 responses but
  with the content being the captive portal's login page.

  apt doesn't realise the content is invalid - it doesn't check the
  signature - before writing it to the system.

  This affects Precise users with apt 0.8.16.

  It shouldn't affect Quantal's 0.9.7 since that apparently checks the
  gpg signatures.

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