[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <20181204114819.phtdqpy32q3vxu4t@suse.de>
Date: Tue, 4 Dec 2018 12:48:20 +0100
From: Marcus Meissner <meissner@...e.de>
To: oss-security@...ts.openwall.com
Subject: Re: UAF write in usb_audio_probe
Hi
Mitre assigned CVE-2018-19824.
On Mon, Dec 03, 2018 at 05:45:30PM +0100, Mathias Payer wrote:
> Hi there,
>
> We reported a security bug to security@...nel.org we discovered in the Linux
> kernel when fuzzing the hardware/software interface, targeting malicious USB
> peripherals. We have developed a fuzzing infrastructure that emulates malicious
> USB peripherals, allowing a fuzzer to feed test input into a virtualized kernel.
> We have tested 8 different recent kernel versions and have found new 37 bugs (so
> far). A first glimpse at all discovered vulnerabilities shows that they contain
> a set of arbitrary reads and arbitrary writes.
>
> The attacker needs local access to plug in a malicious USB device that replays
> the trace (e.g., through FaceDancer) to get read/write primitives in the kernel.
> For, e.g., Android or locked Desktops this becomes security critical. This turns
> these bugs into local "pop the box" opportunities, e.g., to disable screen locks
> or gain root.
>
> We can provide input USB seeds/traces for all discovered bugs/vulnerabilities
> and will report the other bugs as we triage them. Note that we submitted the
> paper that presents the technique to the Dec 01 IEEE Security and Privacy deadline.
>
> So far, we have submitted one bug (and patch) to alsa-devel@...a-project.org
> (after discussing both with the security@...nel.org list). This bug is likely
> exploitable, allowing a local user (not logged in) to gain a write primitive in
> the kernel by simply plugging in a malicious USB device.
> The patch is at:
> https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=5f8cf712582617d523120df67d392059eaf2fc4b
>
> Thanks,
> Mathias Payer
>
--
Marcus Meissner,SUSE LINUX GmbH; Maxfeldstrasse 5; D-90409 Nuernberg; Zi. 3.1-33,+49-911-740 53-432,,serv=loki,mail=wotan,type=real <meissner@...e.de>
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
