this post was submitted on 15 Jul 2024
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Discussion of CVE-2017-5226 (lemmy.zip)
submitted 3 months ago* (last edited 3 months ago) by possiblylinux127@lemmy.zip to c/linux@lemmy.ml
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CVE-2017-5226 is a issue with bubblewrap that allows a program running in a sandbox to excape and get the same privileges as a the parent process. I recently discovered this by mistake and it is fairly concerning to me. ~~I believe it applies to Flatpak as Flatpak uses bubblewrap under the hood.~~

~~Many people like to boast about how secure and private flatpak and some even run untrusted software in it. However, the reality is that there hasn't been a lot of testing and the fact that this CVE still exists but isn't well known is concerning.~~

The reason it wasn't patched is that it is really hard to properly fix. The work around is to call bubblewrap with the --new-session flag as this effectively prevents the excape. However, this breaks interactive programs such as htop. Also the bubblewrap team believes this is a issue that should be solved downstream as this CVE is technically not a CVE in the traditional sense.

I think it is still better to run flatpak over non flatpak but it is something to be aware of

Edit:

It doesn't apply to flatpak as it is patched in 1.3.1and higher https://github.com/flatpak/flatpak/security/advisories/GHSA-7gfv-rvfx-h87x

Basically this is a communication and people problem not a technical one

Edit2:

This isn't exploitable on modern systems with 6.1 or newer with the way most distros compile the kernel

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[–] possiblylinux127@lemmy.zip 1 points 3 months ago (1 children)

Is it?

[–] Bero@lemmy.world 5 points 3 months ago (1 children)

Well the exploit in the CVE needs the kernel function.
And it's disabled as default since 6.2.

[–] refalo@programming.dev 3 points 3 months ago* (last edited 3 months ago) (1 children)

my ubuntu 22 AWS VM only got 6.2 in september, and I haven't rebooted yet so it's still on 5.15. probably tons of desktops and servers are still using < 6.2

[–] Strit@lemmy.linuxuserspace.show 3 points 3 months ago (2 children)

Which is why they said "modern" kernels. LTS systems are usually not going for modern. :)

[–] refalo@programming.dev 5 points 3 months ago (1 children)

we can disagree on the definition of modern.

[–] Strit@lemmy.linuxuserspace.show 1 points 3 months ago

That's true. It varies from person to person. I, for example, am an Arch user, so modern for me is only around a year or so. Ubuntu 22.04 is old in my eyes, mostly because a newer LTS was released after it.

You might define Ubuntu 22.04 as new, because it's still fully supported.

It's just a question of how you define modern/recent.

[–] lord_ryvan@ttrpg.network 3 points 3 months ago

Well, “modern” is a relative term, so that might not have been a good pick...