concerndc1tizena year ago
Do I read correctly that this is related to "rsync daemon" (rsyncd), and therefore has minimal impact on people who just use rsync over ssh?
mhwa year ago
My reading is that the first two CVEs are with rsync daemon, but the others are more general - I think "rsync server" is meaning the remote rsync process that is started when you use ssh to connect to the remote. Some of them suggest the rsync client (running on your machine) can be coerced to write to unexpected locations by a malicious rsync server specifically crafted to exploit these CVEs. One suggests a malicious rsync server might be able to reconstruct the contents of arbitrary files on the client using requests sent via the rsync protocol.
I guess the main takeaway is to be careful using rsync connections to machines that you don't trust.
cresta year ago
It's the same protocol and code implementing it just proxied over SSH instead of a local pipe or unix socket pair. It's a real world issue unless you trust the remote rsync process and the connection with your local user. So basically only SSH between your single-user desktop and same single-user laptop is unimpacted.
formerly_provena year ago
Every rsync operation (even locally) involves an rsync client and a separate rsync server process.
bell-cota year ago
My read (not an expert) is that you are safe if your rsync is only via secure connections, to & from systems where untrusted parties can neither run rsync, nor play clever games with the files which rsync is accessing.
Which (in my paranoid opinion) is pretty much the only secure use case anyway, for code like rsync.
kees99a year ago
> you are safe if your rsync is only via secure connections
Not quite. If server has "command=rsync ..." in ~/.ssh/authorized_keys file, for some ssh key (to allow rsync access, but deny shell access), this vulnerability will allow attacker in possession of that ssh key to go around that restriction, and get shell nonetheless.
nrdvanaa year ago
He said where untrusted parties aren't able to run rsync.
If I was running an rsync daemon facing the public, it would be in a chroot with dropped privileges.
aaron695a year ago
[dead]
throwaway984393a year ago
[dead]
jmclnxa year ago
Slackware sent a fixed version of rsync out yesterday.
But I wonder of OpenBSD's openrsync has the same issue ? Or did that version avoid the issues when it was created ?
If it was avoided, seems OpenBSD was ahead of the curve again.
somata year ago
openrsync is a neat story, it was made because they wanted to use rsync in the rpki system, but the standards body balked, saying they should not be using something where the standard was the implementation, so the openbsd folk(specifically Kristaps Dzonsons) stepped up and made a second rsync implementation so that the standards body could accept the protocol.
ducktectivea year ago
Debian issued a security update too:
rsync (3.2.7-1+deb12u1) bookworm-security; urgency=highcf100clunka year ago
I'm running several Linux distros and package updates to rsync version 3.2.7 have showed up on all of them already. I can't comment on openrsync.
cresta year ago
Given the more permissive license openrsync would be in a pickle if they stole the vulnerable GPL code and claimed to redistribute it under BSD license instead of reimplementing the protocol.
snvzza year ago
Which is highly unlikely to happen in openbsd.
chasila year ago
Does this apply to the GPL or BSD codebase?
There are (now) two rsync codebases.
cresta year ago
It applies to only to rsync and to not the (Open)BSD rewrite openrsync. openrsync intentionally doesn't reimplement all features so it's not always a drop in replacement.
samuelopha year ago
There's a serious regression in the fixes: https://github.com/RsyncProject/rsync/issues/702
It impacts those who need to use `-r` (recursive) together with `-H` (preserve hardlinks),
SOLAR_FIELDSa year ago
Fix was merged an hour ago, roughly an hour after you made this comment (at which time they were still working on it)
samuelopha year ago
There's another one: https://github.com/RsyncProject/rsync/issues/715
[deleted]a year agocollapsed
ThatGuyRaiona year ago
Are these applicable to the openrsync project?
snvzza year ago
Openbsd do unsurprisingly have higher standards for code quality.
captainblanda year ago
> Anonymous read access to a rsync server... such as on a public mirror
I did not know people did that.
arantiusa year ago
For a concrete example: https://www.gentoo.org/support/rsync-mirrors/
Gentoo's package manager most typically updates over rsync.
captainblanda year ago
Oh that's interesting. Thanks