deny launchservicesd mach-lookup to avoid escape#715
Merged
ericcurtin merged 1 commit intomainfrom Feb 27, 2026
Merged
Conversation
The llama-server sandbox profile allowed mach IPC communication with launchservicesd, which open(1) uses to ask launchd to spawn processes. This bypassed job-creation restrictions since launchd — not the sandboxed process — is the actual spawning parent. Deny mach-lookup for com.apple.launchservicesd and its CoreServices alias to close the escape path while leaving other mach operations intact. Signed-off-by: Eric Curtin <eric.curtin@docker.com>
![sourcery-ai[bot]](https://avatars.githubusercontent.com/in/48477?s=60&v=4){kind=small}
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
Contributor
There was a problem hiding this comment.
Code Review
This pull request introduces a security hardening measure for the macOS sandbox profile used by llama-server. The change adds a rule to deny mach-lookup for com.apple.launchservicesd and its alias. This is intended to close a sandbox escape vulnerability where a sandboxed process could bypass job-creation restrictions. The change is consistent with the description and appears to correctly address the specified vulnerability.
ilopezluna
approved these changes
Feb 27, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The llama-server sandbox profile allowed mach IPC communication with launchservicesd, which open(1) uses to ask launchd to spawn processes. This bypassed job-creation restrictions since launchd — not the sandboxed process — is the actual spawning parent.
Deny mach-lookup for com.apple.launchservicesd and its CoreServices alias to close the escape path while leaving other mach operations intact.