Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 6 Jul 2012 23:51:05 +0200
From: Marcus Meissner <meissner@...e.de>
To: oss-security@...ts.openwall.com
Cc: Timo Warns <warns@...-sense.de>
Subject: Re: CVE Request: Stability fixes in UDF Logical
	Volume Descriptor handling

On Wed, Jul 04, 2012 at 02:51:15PM -0600, Kurt Seifried wrote:
> On 07/03/2012 02:46 PM, Timo Warns wrote:
> > Am 03.07.2012 20:58, schrieb Kurt Seifried:
> >> On 07/03/2012 07:22 AM, Marcus Meissner wrote:
> >> 
> >>> People (do not know who) reported to the kernel security team
> >>> and Jan Kara some UDF filesystem crashes.
> >> 
> >>> Jan Kara did some fixes in the UDF fs and they were committed
> >>> to mainline already, both actual bugfixes and some more sanity
> >>>  checking for hardening.
> >>> 
> >>> I think a single CVE is sufficient.
> >> 
> >> Were they discovered by the same person or different people?
> > 
> > I reported the following issue for sparing tables on 2012-06-17 to 
> > security@...nel.org. Eugene Teo informed Jan Kara, who is the
> > maintainer for the UDF filesystem, on the same day. Jan had a
> > closer look at the UDF code and identified all other issues
> > addressed by the patches.
> > 
> > | udf_load_logicalvol() in fs/udf/super.c parses the number of
> > sparing | tables and stores the sparing tables on the heap: | |
> > (1286)  for (j = 0; j < spm->numSparingTables; j++) { | [...] |
> > (1293)    map->s_type_specific.s_sparing. | (1294)
> > s_spar_map[j] = bh2; | | map is of type udf_part_map, whose |
> > s_type_specific.s_sparing.s_spar_map | member can only hold 4
> > pointers to buffer_head structs. | | spm->numSparingTables is read
> > from the file system and not further | validated. A corrupted file
> > system with numSparingTables > 4 causes | a heap overflow.
> > 
> > Regards, Timo
> > 
> 
> Just a placeholder: I'm waiting for a reply from Steve to see if we
> can violate CVE assignment guidelines and put this under one CVE (it
> should probably be two but sorting it out seems like it might not be
> worthwhile).

Unclear ... 

1 reporter
1 developer fixing this bug and making stability fixes on the side

Might just be 1 issue.

CIao, Marcus

Powered by blists - more mailing lists

Your e-mail address:

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.