Date: Thu, 18 Feb 2010 17:41:19 +0100 From: Marcus Meissner <meissner@...e.de> To: oss-security@...ts.openwall.com Subject: Re: CVE request: kernel information leak via userspace USB interface On Thu, Feb 18, 2010 at 09:09:15AM +0800, Eugene Teo wrote: > Hi Marcus, > > On 02/17/2010 06:29 PM, Marcus Meissner wrote: > >While programming a USB device using libusb I found that a usb read from > >the device returned data it should not. > [...] > >Access to USB userspace devices either requires root access or desktop > >user access > >via udev/hal ACLs on non-mass-storage Digital Cameras or Media Players. > >(So the > >desktop user needs to plugin such a ACL getting device before being able > >to read the memory). > > To abuse this, you will need physical access to plug in a USB device, so > I do not think this should be regarded as a security issue. Hmm. Or you exploit the desktop user and then wait until he plugs in such a device (ok, kind of a theoretical scenario, lets ignore). Are we considering "giving desktop local users unintended rights" a security issue or not? (Hmm, init=/bin/sh booting and pressing reset might come into play here too. Then we would not consider that.) Ciao, Marcus
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