Date: Wed, 29 Jul 2020 20:14:07 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 248335] O_BENEATH leaks information about parent directories Message-ID: <bug-248335-227-OE9ozCg6Qw@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-248335-227@https.bugs.freebsd.org/bugzilla/> References: <bug-248335-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248335 --- Comment #2 from Dan Gohman <sunfish@mozilla.com> --- As an example, paths may contain usernames. Usernames may not be sensitive in a username/password sense, but they are in a personally-identifying-information sense. In my application, we have untrusted WebAssembly bytecode running inside an interpreter. The bytecode may make calls to an API called WASI, which includes POSIX-like filesystem access. We have an implementation of WASI which implements sandboxing that works on FreeBSD, however it's slow (about one syscall per path component). A feature like `O_BENEATH` but which instead blocks access to paths outside the topping directory could run much faster. -- You are receiving this mail because: You are the assignee for the bug.help
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