[Desktop-packages] [Bug 1450066] Re: IPv6 hop limit set to 0
This issue may be resolved by providing a newer version of networkmanager (>= 0.9.10.2) In this version a patch was introduced to mitigate CVE-2015-2922 (don't allow setting the HL smaller than it was before) This patch also makes sure a HL < 10 does not get set. [ 1 ] The changelog of version 0.9.10.2 http://www.pro-linux.de/sicherheit/2/print/30542/index.html [ 2 ] CVE-2015-2922 kernel: denial of service (DoS) attack against IPv6 network stacks due to improper handling of Router Advertisements. https://access.redhat.com/security/cve/CVE-2015-2922 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2015-2922 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1450066 Title: IPv6 hop limit set to 0 Status in network-manager package in Ubuntu: Triaged Status in network-manager source package in Vivid: Triaged Bug description: On upgrading from Ubuntu 14.10 to 15.04 I found that my IPv6 networking no longer worked. It turned out that this was because my hop limit was set to zero: # sysctl -a | fgrep eth0.hop_limit net.ipv6.conf.eth0.hop_limit = 0 which in turn seems to have been cause by a known problem in the network manager: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756534 https://bugzilla.gnome.org/show_bug.cgi?id=737252 Since this has already been fixed in the GNOME project, can Ubuntu 15.04 please take the upstream fix? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1450066/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
[Desktop-packages] [Bug 1450066] Re: IPv6 hop limit set to 0
This bug is due to a failure in handling router advertisments. According to RFC 4861 (page 20) a _Cur Hop Limit_ set to 0 means, that the Hop Limit is unspecified. Ubuntu 15.04 takes this literally and sets HL to 0. Fortunately my router provided the option to set this field to a manual value, altough i suppose this is not the case for most routers. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1450066 Title: IPv6 hop limit set to 0 Status in network-manager package in Ubuntu: Triaged Status in network-manager source package in Vivid: Triaged Bug description: On upgrading from Ubuntu 14.10 to 15.04 I found that my IPv6 networking no longer worked. It turned out that this was because my hop limit was set to zero: # sysctl -a | fgrep eth0.hop_limit net.ipv6.conf.eth0.hop_limit = 0 which in turn seems to have been cause by a known problem in the network manager: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756534 https://bugzilla.gnome.org/show_bug.cgi?id=737252 Since this has already been fixed in the GNOME project, can Ubuntu 15.04 please take the upstream fix? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1450066/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
