Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed, 30 May 2012 13:02:53 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Felipe Pena <felipensp@...il.com>, Tomas Hoger <thoger@...hat.com>
Subject: Re: CVE id request: Multiple buffer overflow in unixODBC

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 05/30/2012 11:40 AM, Felipe Pena wrote:
> Hi all,
> 
> 2012/5/30 Kurt Seifried <kseifried@...hat.com>:
>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
>> 
>> On 05/30/2012 02:07 AM, Tomas Hoger wrote:
>>> On Tue, 29 May 2012 09:42:42 -0300 Felipe Pena wrote:
>>> 
>>>> Multiple buffer overflow in unixODBC
>>>> ===========================
>>>> 
>>>> The library unixODBC doesn't check properly the input from 
>>>> FILEDSN=, DRIVER= options in the DSN, which causes buffer 
>>>> overflow when passed to the SQLDriverConnect() function.
>>> 
>>> Reports like this - covering bugs in parsing of the
>>> configuration parameters (i.e. generally trusted input) -
>>> should include some reasoning why these should be considered
>>> security.  Nothing obvious not intended to break PHP safe_mode
>>> comes to mind.
>>> 
>> 
>> Ahh my bad, I misunderstood this to be options that could be
>> passed by the program as a standard part of the query, and thus
>> controlled by the attacker. If this is indeed limited to
>> configuration files and there are not extenuating circumstances
>> that allow exploitation I will have to REJECT these CVEs.
>> 
> 
> It isn't limited to the configuration files. Such input can be
> passed to the `isql' interactive tool that come together unixODBC.
> The same string can be used to connect through PHP PDO, for
> example.
> 
> $ pwd .../unixodbc/src/unixODBC-2.3.1/exe $ ./isql
> "FILEDSN=$(python -c "print 'A'*10000");UID=user" -k Segmentation
> fault
> 
> If it isn't characterized a security issue I'm sorry.
> 
> Thanks.
> 

Is this something that an attacker can typically control, or does the
PHP author need to write code that does this?

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=wmqL
-----END PGP SIGNATURE-----

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.