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Date: Sat, 29 Oct 2022 15:40:42 -0400
From: Demi Marie Obenour <demi@...isiblethingslab.com>
To: oss-security@...ts.openwall.com
Cc: Jisoo Jang <jisoo.jang@...sei.ac.kr>,
Minsuk Kang <linuxlovemin@...sei.ac.kr>
Subject: Re: CVE-2022-3628: A USB-accessible buffer overflow
in Linux kernel driver
On Sat, Oct 29, 2022 at 05:33:21PM +0900, Dokyung Song wrote:
> === Description ===
>
> An intra-object buffer overflow was found in brcmfmac (an upstream
> Broadcom's USB Wi-Fi driver), which can be triggered by a malicious USB
> device.
>
> As the object where the overflow could occur contains multiple function
> pointers (e.g., bus_reset.func), with knowledge of the code layout (i.e.,
> KASLR needs bypassing) the vulnerability could potentially be exploited by
> an attacker who controls USB messages. Without knowledge of the code
> layout, the consequence is a DoS.
Can this be exploited by means of e.g. partial function pointer
overwrites without having to bypass KASLR?
--
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab
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