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Date: Mon, 4 Apr 2011 15:34:00 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: "Steven M. Christey" <coley@...us.mitre.org>,
        Eugene Teo <eugene@...hat.com>
Subject: Re: CVE request: kernel: multiple issues in ROSE

One it is then. Thanks.

Use CVE-2011-1493.

-- 
    JB

----- Original Message -----
> On Mon, Apr 4, 2011 at 2:41 PM, Josh Bressers <bressers@...hat.com>
> wrote:
> > How do we want this broken down? If nobody complains, I'll just give
> > it one.
> >
> 
> I think one makes sense, since all the problems were in a single
> protocol and were addressed at the same time.
> 
> -Dan
> 
> > Thanks.
> >
> > --
> >    JB
> >
> > ----- Original Message -----
> >> Any update on this?
> >>
> >> Thanks,
> >> Dan
> >>
> >> On Mon, Mar 21, 2011 at 12:47 AM, Eugene Teo <eugene@...hat.com>
> >> wrote:
> >> > On 03/21/2011 03:40 AM, Dan Rosenberg wrote:
> >> >>
> >> >> I sent in a patch [1] resolving two issues in ROSE:
> >> >>
> >> >> "When parsing the FAC_NATIONAL_DIGIS facilities field, it's
> >> >> possible
> >> >> for a remote host to provide more digipeaters than expected,
> >> >> resulting
> >> >> in heap corruption. Check against ROSE_MAX_DIGIS to prevent
> >> >> overflows, and abort facilities parsing on failure.
> >> >>
> >> >> Additionally, when parsing the FAC_CCITT_DEST_NSAP and
> >> >> FAC_CCITT_SRC_NSAP facilities fields, a remote host can provide
> >> >> a
> >> >> length of less than 10, resulting in an underflow in a memcpy
> >> >> size,
> >> >> causing a kernel panic due to massive heap corruption. A length
> >> >> of
> >> >> greater than 20 results in a stack overflow of the callsign
> >> >> array.
> >> >> Abort facilities parsing on these invalid length values."
> >> >>
> >> >> These issues may both result in code execution. They may be
> >> >> triggered
> >> >> by a remote attacker if the victim has a listening ROSE socket,
> >> >> or
> >> >> by
> >> >> a local attacker (for privilege escalation) if a ROSE device
> >> >> exists
> >> >> (e.g. rose0).
> >> >>
> >> >> Ben Hutchings followed up with a patch [2] that resolves a
> >> >> number
> >> >> of
> >> >> other ROSE issues related to lack of size field validation, some
> >> >> of
> >> >> which may also result in heap corruption.
> >> >>
> >> >> Not sure about the proper CVE breakdown for all these issues,
> >> >> since
> >> >> the entire protocol was quite broken. Perhaps one is enough to
> >> >> cover
> >> >> everything.
> >> >
> >> > I am not sure. I would just assign one for the collection of
> >> > issues
> >> > here but
> >> > I will let Steve decide instead.
> >> >
> >> >> [1] http://marc.info/?l=linux-netdev&m=130060344616926
> >> >> [2] http://marc.info/?l=linux-netdev&m=130063972406389&w=2
> >> >
> >> > Thanks, Eugene
> >> > --
> >> > main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) &&
> >> > main(++i); }
> >> >
> >

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