Zed downloads NodeJS binary and npm packages from Internet without user’s consent

[jirutka]

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• Completed

Describe the bug / provide steps to reproduce it

I noticed that Zed automatically downloads the NodeJS binary from https://nodejs.org without asking or even informing the user about it. Right after starting it and opening a file, without doing anything else. And there’s no option to disable it.

This is completely unacceptable!

Not just for security reasons but also from a usability point of view. I’m currently connected via metered LTE, and Zed has just eaten up 14 MiB of my plan. Moreover, I already have node installed and on PATH. Also, the downloaded binary is somehow corrupted and it wouldn’t work on my system anyway because it’s built against glibc (that’s how I noticed it in the first place).

And to make matters worse, if it did work, it would start installing arbitrary packages from npmjs.com via npm and running their scripts. This represents a huge attack vector.

This approach is completely unacceptable for anyone who’s concerned about cybersecurity and for virtually all companies, at least in the EU, because of cybersecurity laws, related certifications and audits.

EDIT: Now I found that it downloads (here) even some proprietary binary from https://supermaven.com, i.e. unaudited and unauditable code, without any verification (except TLS)! At least this is not downloaded by default… I hope…

EDIT2: Zed also automatically downloads and executes prebuilt language servers for C#, Clojure, Deno, Elixir, Gleam, GLSL, Lua, Terraform, Toml and Zig. It automatically resolves the latest version available on GitHub and downloads it, again, without any verification.

Environment

N/A

If applicable, add mockups / screenshots to help explain present your vision of the feature

No response

If applicable, attach your ~/Library/Logs/Zed/Zed.log file to this issue.

No response

Somehow related issues

• Isolate (sandbox) language servers #12358
• Ability to disallow network requests from plugins #12354
• [WIP] Require extensions to request downloads #12703

[asesh]

I agree with you, it can cause severe security issues. It will also download unsigned executable files and run them w/o any consent or permission. That's why I have language server disabled. You can disable this feature though: https://zed.dev/docs/configuring-zed

[vielmetti]

Some of this is previously discussed in #7054 , specifically #7054 (comment) in which @SomeoneToIgnore writes

"We do not have plans to abandon this approach since there's so much code written to support various frontend tools already, that rewriting those in Rust will take an eternity, so not sure what is actionable here, hence closing."

[jirutka]

That's why I have language server disabled. You can disable this feature though: https://zed.dev/docs/configuring-zed

Language servers are very useful. I don’t see an option to disable the automatic fetching of dependencies from the internet without disabling the language servers completely.

[jirutka]

"We do not have plans to abandon this approach since there's so much code written to support various frontend tools already, that rewriting those in Rust will take an eternity, so not sure what is actionable here, hence closing."

This is a false dichotomy. Nobody is asking to rewrite everything in Rust and bundle it into the application (on the contrary, I’d ask the opposite). Node.js is a normal system dependency that should be installed by the system’s package manager, or manually (if there’s no package manager in place). And that’s what I did for the Alpine Linux package, but I had to patch the Zed sources to do it.

[someone13574]

Maybe a popup, which is enabled by default, could ask for permission to download some-binary from some-link? It wouldn't mitigate the fact that its downloading a binary, but it would at least give the user an option to see whats getting downloaded beforehand and see that its from somewhere official. Then in settings there could be three options for download_permission or something:

• ask: The default setting. Asks the user for permission to download a file.
• always: The current behavior. Just download without asking.
• never: Never download any files. May break extensions and isn't recommended (but available for users who don't have a glibc system, really value security, or any other reason).

[asesh]

That's why I have language server disabled. You can disable this feature though: https://zed.dev/docs/configuring-zed

Language servers are very useful. I don’t see an option to disable the automatic fetching of dependencies from the internet without disabling the language servers completely.

They are useful but I would rather keep my machine safe than ran arbitrary executables and scripts. That's why I have it disabled. This is a really weird and insecure feature of Zed!!

[someone13574]

Ideally you would be able to turn off auto-download but still be able to use an lsp if it’s already on the users system.

[crabdancing]

Yeah, this issue really turned me off using Zed until it's fixed. :/

It tried to run them and then hilariously couldn't because I'm on a NixOS system:

[2024-06-16T12:55:07-06:00 ERROR project] failed to start language server "json-language-server": failed to execute npm info subcommand:
stdout: ""
stderr: "Could not start dynamically linked executable: /home/ada/.local/share/zed/node/node-v18.15.0-linux-x64/bin/node\nNixOS cannot run dynamically linked executables intended for generic\nlinux environments out of the box. For more information, see:\nhttps://nix.dev/permalink/stub-ld\n"

Frankly, not having the ability to configure it to just use what's in my environment (which I have already audited), or specific paths that I give it, is a dealbreaker. I much prefer Helix's simpler approach to this of just telling you what it has access to and what it doesn't, and letting you override the things it's trying to use.

[vinicius507]

Yeah, this issue really turned me off using Zed until it's fixed. :/

It tried to run them and then hilariously couldn't because I'm on a NixOS system:

[2024-06-16T12:55:07-06:00 ERROR project] failed to start language server "json-language-server": failed to execute npm info subcommand:
stdout: ""
stderr: "Could not start dynamically linked executable: /home/ada/.local/share/zed/node/node-v18.15.0-linux-x64/bin/node\nNixOS cannot run dynamically linked executables intended for generic\nlinux environments out of the box. For more information, see:\nhttps://nix.dev/permalink/stub-ld\n"

Frankly, not having the ability to configure it to just use what's in my environment (which I have already audited), or specific paths that I give it, is a dealbreaker. I much prefer Helix's simpler approach to this of just telling you what it has access to and what it doesn't, and letting you override the things it's trying to use.

Yes, on NixOS and I had to wrap Zed in a FHS environment so I could use the LSPs. Not the best experience imo.

[imbev]

I am also concerned about this. Either I disable LSP or I allow the automatic download of arbitrary binaries from GitHub. This is a dealbreaker, and prevents Zed's use in security conscious environments.

[sgriff96]

I don't think anyone is asking for the team to re-write every binary in Rust. We just want to be asked to install the language server or not. If you click no, then you don't install all the necessary things for that language.

[imbev]

I don't think anyone is asking for the team to re-write every binary in Rust. We just want to be asked to install the language server or not. If you click no, then you don't install all the necessary things for that language.

The current behavior prompts on a per-language basis, but #12589 (comment) would be a significant improvement.

[someone13574]

I don't think anyone is asking for the team to re-write every binary in Rust. We just want to be asked to install the language server or not. If you click no, then you don't install all the necessary things for that language.

This has been turned down already: #12703 (comment). As said in the comment it is likely that the extension API will be changed if we don't want to manually make sure every extension does the desired behavior (respect a "no downloads" setting, searching path, gracefully handling when downloads aren't allowed, etc.)

[shinebayar-g]

Related

• Stop Auto downloading new updates, bunch of things on startup #9224

[Calandracas606]

As an additional point which should be brought up again, is that downloading binaries like this simply will not work on distributions using musl as the libc, and there should be an alternate method of providing dependencies for those users.

[peterlandry]

@sambonbonne fair enough, reasonable point. I understand there's a lot of nuance to think about, but I don't see why it would stand in the way of a behavior where on the first need to grab something, zed asks, and records the answer. It's a good start while more in-depth solutions are discussed (rather than punting on the whole issue).

[alerque]

There is quite a bit of missing the forest for the trees here, and some false dichotomies.

• Nobody is freaking out about 14 MB. The issue is when and how anything at all is downloaded and the current lack of transparency and that sensitive action. This behind the scenes action makes the editor completely unusable on some platforms (e.g. Nix) and introduces anti-patterns and conflicts for others (many/most distro packaging). For others just workplace operational rules preclude the use of any tooling that acts like this.

• There is not a binary choice between software being "friendly to end users" and "secure". You can have your cake and eat it too—it just takes intention and a little more developer focus. The main thing that I think should be added by developers is not a user facing popup or preference (where opt-in vs. opt-out is an issue, as is noise & friction), but compile-time options (most useful to packagers, but also usable by workplaces or end users). If Zed offered compile time configuration this could be fixed to everybody's satisfaction. Distros could ship a pre-configured package with all the dependencies already provided so that the user experience is just "install and run" (appeasing both the distros and their end users expectations) while also not having an app that downloads (or attempts to download) binaries behind the users back. End users with strong preferences could also compile it to suite their requirements. Meanwhile if Zed wants to ship a binary package themselves that defaults to silently downloading tooling at runtime they still can.

  The necessary compile time options would be a master "don't try downloading anything silently" option (that dovetails nicely with the existing "don't try to self-update" which distros already use via export ZED_UPDATE_EXPLANATION="...") and then specific options to set paths to existing tooling that could be used directly, e.g. USE_SYSTEM_NODEJS USE_SYSTEM_PRETTIER.

[michealp-coder]

@mrnugget

This isn't just a language server concern.

1-year ago, this security concern was also documented here.

Where the VSCode theme importer is silently attempting to install a Home Brew package and execute it.

(I hope people's voicing concern adds this to the priority pile. And also want to say thank you so much for creating Zed ... and acknowledge it's currently free, pre 1.0 and some users can have unrealistic demands on creators)

[mrnugget]

This isn't just a language server concern.

1-year ago, this security concern was also documented here.

Where the VSCode theme importer is silently attempting to install a Home Brew package and execute it.

I wasn't around a year ago, but as far as I can tell: that extension runs in VS Code and wasn't published nor written by the Zed team. The theme importer it uses under the hood was written by the Zed team and everybody can read through its source here: https://github.com/zed-industries/zed/tree/main/crates/theme_importer That theme_importer was not published to homebrew by Zed either. (Also, @michealp-coder, you were in that thread in which it was explained how that theme_importer was created: #7111 (comment))

Since Zed doesn't advertise nor officially recommend that VS Code extension, I don't think there's a lot we can do about it (should we actively advertise against it? not sure)

[tv42]

For anyone else like me who wants to put in a technical stopgap kludge to prevent Zed from downloading things that pretty much aren't going to work on my NixOS anyway, putting this in your settings.json breaks at least some of that:

  "server_url": "https://disable-zed-downloads.invalid",

[revskill10]

Allow an environment variable like NODE_PATH should skip the unessessary Node download.

[mikayla-maki]

Since 28 separate people get a ping on every message here, I'm going to lock this issue for now. We are currently working on this, follow along here: #14034

[mikayla-maki]

Status update: We are still working on this! The major blocker is that extensions have not been setup to interact with setting. However, we also need to change this API to support our upcoming remote development feature. So we're going to roll both of these breaking changes into a larger extension update, coming this November or December :)

[mikayla-maki]

Hello everyone! As you may have noticed, I did not get a chance to close this issue in November or December. My apologies for not managing time for this correctly. However, this issue is still important to us and solving it is essential for deploying Zed in many enterprise environments. We're not going to miss this, scheduling is just messy :)