PSA: update your DNS resolvers (PiHole, unbound, Bind9, dsnmasq) to patch DNSSEC vulnerability

ratzki , 4 months ago

Not sure why, but on Synology with docker, the pihole:latest releases are usually a mess and restoring settings and client lists does not work.
Unfortunately, only “latest -2” seems to work most of the time.

¯\_(ツ)_/¯

kindenough , 4 months ago

Thanks for the heads -up.

Nunya , 4 months ago

Sorry if this is a basic question. So if I have a pihole, do I just need to update the Raspberry Pi software, along with updating pihole software to resolve the insecurities? Or do I need to change the DNS settings of the pihole?

BlackEco OP , 4 months ago

If you use a third-party's DNS server (such as Cloudflare, Quad9 or Google) as your upstream DNS server, you only have to update PiHole.

If you have set up your own upstream DNS server using a DNS resolver like unbound or Bind9, update it as well as your PiHole.

Nunya , 4 months ago

Makes sense, thanks for the response.

EpicVision , 4 months ago

You need to update Pihole

admin , 4 months ago

Wouldn't the attacker have to be on the same network as the resolver for this to work? Or could it be triggered by a "dirty hostname"?
Because in the former case, most home networks would not be at much risk.

BlackEco OP , 4 months ago

It's the latter. Unless you run your own DNS resolver, most people are safe

TCB13 , 4 months ago

What's the status of SmartDNS (that is used by OpenWRT and DD-WRT) on this? Anyone knows anything?

BlackEco OP , 4 months ago

I struggle to find if it uses DNSSEC or even a change log. If it does, contact the maintainer and disable DNSSEC (if you can) until a fix is released.

muntedcrocodile , 4 months ago

What about on mobile? Those of us who use dns filtering on mobile.

BlackEco OP , 4 months ago

I'm not familiar with off-the-shelf DNS filtering on mobile, but since running a DNS resolver on-device would be impractical, I think they must be using a DNS server that they maintain. Which means that unless I'm wrong, the vulnerability lies on their end, you should be fine.

muntedcrocodile , 4 months ago

I been using rethink dns but ik their are other for android at least. Works by making a local vpn magic.

BlackEco OP , 4 months ago

They maintain their own resolver, so they have to patch it if not done already.

Fedegenerate , 4 months ago

My unbound is on v1.13.1 (Raspbian) after update/upgrade. I've read it lags behind the main release by alot, should I trust the process that everything is fine.

9tr6gyp3 , 4 months ago

Its up to your distros package maintainer to make the patched version available. You can find who maintains it and contact them so they are aware.

Fedegenerate , 4 months ago

Cheers

ARNiM , 4 months ago

Debian usually backports security fixes to older versions, so you may wanna check to Debian if they have an updated version of the package with the security fix.

This can be done by taking the CVE number related to this vulnerability and look at the package changelog.

ChaoticEntropy , 4 months ago

I'm on DietPi 9 and the latest version for Debian 12 is 1.17.1, sadly. Though I do see 1.19.1 is in testing as of today, according to Debian's package tracker site. Probably not worth trying to install an unstable version of it.

Rooki , 4 months ago

I installed it now, it is working fine with my pihole. It wasnt that much of a hussle but a bit of googling.