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Date: Thu, 12 Jul 2012 08:14:10 +0200
From: Stefan Cornelius <>
CC: Kees Cook <>
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:
>> Red Hat patch backports/testcases for RHEL6 that include a patch for this:
>> Red Hat patch backport/testcase for RHEL5 (older glibc versions)
> 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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