[Bug 1108545] Re: In Raring, the reported IPv6 address contains the computer's mac address, compromising security.

[Mark Kelley]

This is my /etc/sysctl.d/10-ipv6-privacy.conf:

# IPv6 Privacy Extensions (RFC 4941)
# ---
# IPv6 typically uses a device's MAC address when choosing an IPv6 address
# to use in autoconfiguration. Privacy extensions allow using a randomly
# generated IPv6 address, which increases privacy.
#
# Acceptable values:
#    0 - don’t use privacy extensions.
#    1 - generate privacy addresses
#    2 - prefer privacy addresses and use them over the normal addresses.
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.use_tempaddr = 2

(You will notice that the use_tempaddr value is 2.  That was, I think, 
changed when I was trying to fix this problem.  But it still doesn't work.)

The output of cat /proc/sys/net/ipv6/conf/default/use_tempaddr is 2
The output of cat /proc/sys/net/ipv6/conf/all/use_tempaddr is 2

The output from those used to be 0, but again I changed to 2 as I tried 
to fix the problem.  It still doesn't work.


------------------------------------------------------------------------

*From:* Marc Deslauriers <mailto:marc.deslauriers at canonical.com>
*Sent:* Wednesday, January 30, 2013 9:24AM
*To:* mcellius <mailto:mcellius at gmail.com>
*Subject:* [Bug 1108545] Re: In Raring, the reported IPv6 address 
contains the computer's mac address, compromising security.



Could you attach the contents of your /etc/sysctl.d/10-ipv6-privacy.conf
file?

Also, what is the result of the following two commands?

$ cat /proc/sys/net/ipv6/conf/default/use_tempaddr
$ cat /proc/sys/net/ipv6/conf/all/use_tempaddr

Thanks.

** Information type changed from Private Security to Public Security

** Package changed: ubuntu => network-manager (Ubuntu)

** Package changed: network-manager (Ubuntu) => procps (Ubuntu)

** Changed in: procps (Ubuntu)
        Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1108545

Title:
  In Raring, the reported IPv6 address contains the computer's mac
  address, compromising security.

Status in “procps” package in Ubuntu:
  Incomplete

Bug description:
  On my computer containing installation of 12.04, 12.10, and Raring,
  this does not happen in 12.04 or 12.10; it's only within Raring.  I
  have been unable to change this.

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