Re: CVE Request: bad USB host adapter implementation can corrupt memory/brick machine

[Adam Maris <amaris () redhat com>]

On 02/06/16 11:10, Marcus Meissner wrote:

> Hi,
>
> reported here:
>
> https://marc.info/?l=linux-usb&m=146480770532266&w=2
>
> issue is that the Frescologic device id 1009 host controller apparently
> has a broken XHCI STREAMS implementation which would lead to memory corruptions
>
> Redhat might have already assigned a CVE.
>
> I am not sure if this is controllable for code execution, but at least USB devices can be used
> to brick a machine with the kernel running (local denial of service)?
>
> Ciao, Marcus

Red Hat hasn't assigned CVE. Overall, this has only minor security
implications. Bricking machine doesn't seem to be easily reproducible,
since on the second tested mobo it merely showed as a random memory
corruption and hard locked system. It requires specific class of
external usb devices getting plugged into machine with specific broken
xhci controller.

-- 
Adam Mariš, Red Hat Product Security
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