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Date: Mon, 4 Apr 2011 14:45:03 -0400
From: Dan Rosenberg <dan.j.rosenberg@...il.com>
To: oss-security@...ts.openwall.com
Cc: Josh Bressers <bressers@...hat.com>, "Steven M. Christey" <coley@...us.mitre.org>, 
	Eugene Teo <eugene@...hat.com>
Subject: Re: CVE request: kernel: multiple issues in ROSE

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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