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Date: Sat, 14 Sep 2013 12:56:02 +0200
From: Florian Weimer <fweimer@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: Re: CVE Request: glibc getaddrinfo() stack overflow
On 08/22/2013 09:18 AM, Florian Weimer wrote:
> On 07/04/2013 09:06 PM, Maksymilian wrote:
>>> Perhaps there are some missing CVE ids?
>>
>> In 2011 the problem with alloca() was not defined as a vulnerability.
>>
>> http://sourceware.org/bugzilla/show_bug.cgi?id=12671
>
> I believe the analysis in this bug report is incorrect. The security
> implications are unclear. A straight copy of a long name to a stack
> buffer should trigger a crash because it hits the guard page, but even
> that could be a problem for daemons.
>
> On the other hand, it's impossible to know for sure that no GCC version
> ever lays out the stack in such a way that we end up with a problem.
> Multi-threaded programs linking in script interpreters are more exposed
> to these problems, too.
Kurt told me that the above didn't make it sufficiently clear that I
consider this issue CVE-worthy.
--
Florian Weimer / Red Hat Product Security Team
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