On Fri, Nov 17, 2017 at 02:32:43PM -0800, Josh Triplett wrote: > Package: firefox > Version: 57.0-1 > Severity: normal > > Something in Firefox seems to be writing addons to /tmp/tmpaddon as part > of the installation process. (Mentions in bugs like > https://bugzilla.mozilla.org/show_bug.cgi?id=1385303 seem to confirm > this.) This needs confirmation to make sure it isn't an insecure > tempfile vulnerability, but even if it isn't, it *should* be using a > secure temporary file name to avoid conflict with other users.
toolkit/mozapps/extensions/internal/ProductAddonChecker.jsm does: let f = await OS.File.openUnique(OS.Path.join(OS.Constants.Path.tmpDir, "tmpaddon")) toolkit/mozapps/extensions/internal/XPIProvider.jsm does: let path = OS.Path.join(OS.Constants.Path.tmpDir, "tmpaddon"); let unique = await OS.File.openUnique(path); Those are the only two references to "tmpaddon", and openUnique creates unique file names with the given prefix. So this shouldn't be happening. Mike
