Bug#932769: [moreinfo] DoS via DHCP request

2019-07-24 Thread Tomas Pospisek
So my interpretation of your initial bug report, that the VM would DoS the host on which it was running via fast changing of IP addresses on its interface was completely off the track? So what you wanted in fact wanted to say by "DoS'ing the server" was that the VM sends huge amounts of DHCP

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-24 Thread Sven Hartge
On Tue, 23 Jul 2019 19:32:04 -0600 Mark Hutchison wrote: > When I look at systemctl for the dhclient service, I can see that there's > an error, "can't create /var/lib/dhcp/dhclient.intname.leases Read Only > file system", and then the DHCPREQUEST > DHCPACK > DHCPDECLINE sequence > starts every

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-23 Thread Mark Hutchison
Hi fellas, Apologies for the brevity in the initial bug report. I was using the reportbug tool directly from the console of the VM I was working on, small resolution. Allow me to elaborate... We initially discovered this bug testing our storage product, we had a Debian 10 VM running in a

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-23 Thread Tomáš Pospíšek
Am 23.07.19 um 17:57 schrieb Ben Hutchings: > On Tue, 2019-07-23 at 16:51 -0400, Tomas Pospisek wrote: >> Package: general >> Followup-For: Bug #932769 >> >> Could you privide a recipe on how to reproduce this? There's a lot of >> very special setup below, that someone wwould need large amounts of

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-23 Thread Ben Hutchings
On Tue, 2019-07-23 at 16:51 -0400, Tomas Pospisek wrote: > Package: general > Followup-For: Bug #932769 > > Could you privide a recipe on how to reproduce this? There's a lot of > very special setup below, that someone wwould need large amounts of time > to reporoduce I feel. > > Is it possible

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-23 Thread Tomas Pospisek
One more question. When you say VNWare integrated product. AFAIK vmware have their own networking module in the kernel? Can you reproduce this with some other virtualisation technology like kvm, qemu? And one more question: do depending on who does the DHCP receival in the VM (systemd?

Bug#932769: [moreinfo] DoS via DHCP request

2019-07-23 Thread Tomas Pospisek
Package: general Followup-For: Bug #932769 Could you privide a recipe on how to reproduce this? There's a lot of very special setup below, that someone wwould need large amounts of time to reporoduce I feel. Is it possible to reduce the problem to something easily demonstratable? This seems to