[Bug 381896] [NEW] bad router advertisement lead to disabilitation of ipv6 privacy extension

[Davide]

Public bug reported:

Binary package hint: linux-source

After enabling IPV6 privacy extension (with echo 2 > /proc/sys/net/ipv6/conf/eth8/use_tempaddr)
ubuntu autoconfigs, as aspected, ipv6-privacy-extension-addresses and they change every 60 seconds makeing outgoing connection droped every 60 seconds (radvd running on 6to4 prefix with  AdvPreferredLifetime 20 and AdvValidLifetime 30).
After changing AdvValidLifetime to 300 in radvd (on the router) ubuntu starts getting assigned more and more addresses up to about 15.
Changing AdvValidLifetime back to 30 lead ubuntu to deconfigure ALL ipv6-privacy-extension-addresses addresses leaving the interface with only the stateless address but interface is still configured to use privacy extension but it's no longer used. So privacy is no longer ensured without any user command but just some crafted ra packets.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ipv6

-- 
bad router advertisement lead to disabilitation of ipv6 privacy extension
https://bugs.launchpad.net/bugs/381896
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux-meta in ubuntu.