Date: Tue, 05 Mar 2019 18:50:02 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236291] [FUSE] fuse(4) ignore file permissions Message-ID: <bug-236291-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236291 Bug ID: 236291 Summary: [FUSE] fuse(4) ignore file permissions Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: asomers@FreeBSD.org fuse(4) is supposed to have two different modes of operation. With the "-o default_permissions" mount option, the kernel is supposed to do all validation of file permissions (it doesn't, but that's a separate bug: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216391). Without that mount option, fuse(4) is supposed to query the daemon to validate permissions with FUSE_ACCESS. However, our currently implementation isn't doing that. Instead, fuse_internal_access merely validates: * The filesystem is not read-only if write access is requested * The accessing user is the same user who is running the daemon if "-o allow_other" was not specified at mount time This means, for example, that a user can execute a non-executable file stored on a fuse filesystem. -- You are receiving this mail because: You are the assignee for the bug.help
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