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Date: Fri, 16 Jul 2010 11:08:14 -0400 (EDT)
From: Josh Bressers <>
        coley <>
Subject: Re: CVE request: NetSMB BSD kernel module (minor)

Please use CVE-2010-2530

Sorry for the delay.


----- "Dan Rosenberg" <> wrote:

> I discovered and reported a minor security issue in the netsmb kernel
> module for NetBSD and FreeBSD.  The issue also affects Mac OS X 10.x,
> where netsmb is available as a kernel extension.
> Several of the subroutines in the netsmb module (see reference below
> for vulnerable functions), which are reachable by unprivileged local
> users via device ioctls sent to a /dev/nsmb* device, had signedness
> errors.  By providing a negative value for a size field for certain
> device ioctls (including SMBIOC_LOOKUP and SMBIOC_OPENSESSION for
> *BSD), a size check will be bypassed and a memory overallocation will
> occur, causing a kernel panic.  NetBSD committed their fix to CVS
> today:
> Regards,
> Dan Rosenberg

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