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Date: Fri, 16 Jul 2010 11:08:14 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: security-alert@...bsd.org, secteam@...ebsd.org, product-security@...le.com,
        coley <coley@...re.org>
Subject: Re: CVE request: NetSMB BSD kernel module (minor)

Please use CVE-2010-2530

Sorry for the delay.

-- 
    JB


----- "Dan Rosenberg" <dan.j.rosenberg@...il.com> 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:
> 
> http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/netsmb/smb_subr.c.diff?r1=1.34&r2=1.35&only_with_tag=MAIN&f=h
> 
> Regards,
> Dan Rosenberg

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