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Date: Thu, 12 Jul 2012 08:14:10 +0200
From: Stefan Cornelius <scorneli@...hat.com>
To: oss-security@...ts.openwall.com
CC: Kees Cook <kees@...ntu.com>
Subject: Re: CVE request: glibc formatted printing vulnerabilities
On 07/11/2012 11:37 PM, Kees Cook wrote:
> Hi Stefan,
>
> On Wed, Jul 11, 2012 at 12:32:35PM +0200, Stefan Cornelius wrote:
>> 3) It was discovered that the formatted printing functionality in glibc
>> did not properly restrict the use of alloca(). A remote attacker could
>> provide a specially crafted sequence of format specifiers, leading to a
>> crash or, potentially, FORTIFY_SOURCE format string protection mechanism
>> bypass, when processed.
>>
>> References:
>> https://bugzilla.redhat.com/show_bug.cgi?id=826943
>>
>> Red Hat patch backports/testcases for RHEL6 that include a patch for this:
>> https://bugzilla.redhat.com/attachment.cgi?id=594722&action=diff
>>
>> Red Hat patch backport/testcase for RHEL5 (older glibc versions)
>> https://bugzilla.redhat.com/attachment.cgi?id=594727&action=diff
>
> Is there an upstream commit proposed for this one? I see it mixed into
> the RH patch with fixes for 1) and 2).
>
> Thanks,
>
> -Kees
>
Hi Kees,
Unfortunately, I'm currently unaware of an upstream patch for this. I've
asked our maintainers for the status of this and, hopefully, I can
provide you with a better response soon.
Kind regards,
--
Stefan Cornelius / Red Hat Security Response Team
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