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deny launchservicesd mach-lookup to avoid escape #715

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Merged
ericcurtin merged 1 commit into from
Feb 27, 2026
Merged

deny launchservicesd mach-lookup to avoid escape #715

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9 changes: 9 additions & 0 deletions pkg/sandbox/sandbox_darwin.go
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Expand Up @@ -51,6 +51,15 @@ const ConfigurationLlamaCpp = `(version 1)
;;; Deny access to job creation.
(deny job-creation)

;;; Deny access to launchservicesd to prevent sandbox escape via open(1).
;;; Without this, a sandboxed process can invoke open(1) which uses
;;; launchservicesd to ask launchd to spawn a new process, bypassing
;;; job-creation restrictions because launchd (not the sandbox) is the
;;; actual parent. See ZDI-CAN-29308.
(deny mach-lookup
(global-name "com.apple.launchservicesd")
(global-name "com.apple.coreservices.launchservicesd"))

;;; Don't allow new executable code to be created in memory at runtime.
(deny dynamic-code-generation)

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