I have pointed this out privately.

brywilharris (at) gmail (dot) com
On Sep 25, 2012 11:25 AM, "Paul F" <[email protected]> wrote:

> See also Bug #756317, Bug #1001209, Bug #1034834
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1055614
>
> Title:
>   captive web portal corrupt Indexes
>
> Status in “update-manager” package in Ubuntu:
>   Confirmed
>
> Bug description:
>   When the computer is connected to a captive web portal, the update
>   manager does not check to see that files downloaded are valid indexes.
>   This results in the web portal's html file being written over some or
>   all of the files in /var/lib/apt/lists.  I have been able to remove
>   the corrupted files (assuming if they are that easy to overwrite, then
>   blowing them away will be OK too) with the following command:
>
>   cd /var/lib/apt/lists
>   for foo in `grep -r weblogin.jsp .|cut -f 1 -d ':'`; do sudo rm -f $foo;
> done
>
>   This is not something a new user could be expected to do.   I don't
>   know if the behavior has changed recently, but this is the second time
>   I have run into this bug in the last month.
>
>   This results in complete breakage of the update system stops all
>   updating until it is fixed.  The user does get a little red error icon
>   with an relatively opaque error message which was how I knew to look
>   in the /var/lib/apt/lists directory.
>
>   This prevents all security updates so I have flagged it as a security
>   vulnerability.
>
>   1) The release of Ubuntu you are using, via 'lsb_release -rd' or System
> -> About Ubuntu
>   bryan@bryan-Aspire-V3-771:~/temp$ lsb_release -rd
>   Description:  Ubuntu 12.04.1 LTS
>   Release:      12.04
>
>   2) The version of the package you are using, via 'apt-cache policy
> pkgname' or by checking in Software Center
>   bryan@bryan-Aspire-V3-771:~/temp$ apt-cache policy update-manager
>   update-manager:
>     Installed: 1:0.156.14.9
>     Candidate: 1:0.156.14.9
>     Version table:
>    *** 1:0.156.14.9 0
>           500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main
> amd64 Packages
>           100 /var/lib/dpkg/status
>        1:0.156.14.5 0
>           500 http://security.ubuntu.com/ubuntu/ precise-security/main
> amd64 Packages
>        1:0.156.14 0
>           500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64
> Packages
>
>   3) What you expected to happen
>   /var/lib/apt/lists should not get corrupted when the computer is on a
> captive portal before login.
>
>   4) What happened instead
>   /var/lib/apt/lists does get corrupted in a way that has no (obvious to a
> normal user) fix.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1055614/+subscriptions
>

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https://bugs.launchpad.net/bugs/1055614

Title:
  captive web portal corrupt Indexes

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