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Message-ID: <4D86D86C.9060702@redhat.com>
Date: Mon, 21 Mar 2011 12:47:40 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: Dan Rosenberg <dan.j.rosenberg@...il.com>,
"Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: CVE request: kernel: multiple issues in ROSE
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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