oss-sec mailing list archives
Re: CVE request: kernel information leak via userspace USB interface
From: "Bernhard R. Link" <brlink () debian org>
Date: Thu, 18 Feb 2010 22:15:00 +0100
* Eugene Teo <eugene () redhat com> [100218 02:09]:
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.
- What about users that already have such a device pluged in? - Just because someone has access to your hardware does not mean they should have total control. Computer cases can be locked, even put in other rooms with only monitor and usb ports (and keyboard and mouse in usb) available to people that should only have user rights and not root rights. You can have employees/cameras to look users are not using drilling machines on the cases or open the keyboards to add chips. But you can hardly stop people from plugging in devices. (And I think studies show that if you add any device on the street, people finding them will plug them into their computer as the first thing they do). It might be a minor issue or something not worth issuing a id, but a security issue it is. Bernhard R. Link
Current thread:
- CVE request: kernel information leak via userspace USB interface Marcus Meissner (Feb 17)
- Re: CVE request: kernel information leak via userspace USB interface Eugene Teo (Feb 17)
- Re: CVE request: kernel information leak via userspace USB interface Marcus Meissner (Feb 18)
- Re: CVE request: kernel information leak via userspace USB interface Steven M. Christey (Feb 18)
- Re: CVE request: kernel information leak via userspace USB interface Eugene Teo (Feb 18)
- Re: CVE request: kernel information leak via userspace USB interface Marcus Meissner (Feb 18)
- Re: CVE request: kernel information leak via userspace USB interface Bernhard R. Link (Feb 18)
- Re: CVE request: kernel information leak via userspace USB interface Eugene Teo (Feb 17)