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Date: Wed, 28 Jan 2015 13:03:41 -0500 (EST)
From: cve-assign@...re.org
To: Huzaifa Sidhpurwala <huzaifas@...hat.com>
cc: oss-security@...ts.openwall.com,
Mitre CVE assign department <cve-assign@...re.org>
Subject: Re: GHOST gethostbyname() heap overflow in glibc
(CVE-2015-0235)
On Wed, 28 Jan 2015, Huzaifa Sidhpurwala wrote:
> On 01/27/2015 11:35 PM, Florian Weimer wrote:
>> * Marek Kroemeke:
>>
>>> We just noticed CVE-2015-0235 , and we thought we will drop this one
>>> in - apologies for low quality , we didn't really have time yet to
>>> analyse it, but it seems to be related, so it makes sense to patch
>>> things once right ?
>>
>> It's not related, and we cannot patch it at the same time because
>> packages for the gethostbyname issue are already ready, they just have
>> to be released. (When we change critical system components, we also
>> need to be extra-careful with testing, which takes time.)
>>
>> Andreas Schwab fixed this in 2011:
>>
>> <https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=2e96f1c7>
>>
>> If I'm not mistaken, this commit when into glibc 2.15.
>>
>> I have not yet found the corresponding glibc bug (if it exists).
>>
>> The bug only materializes if the getaddrinfo functions is called with
>> the AI_IDN flag, and if glibc has been compiled with libidn support
>> (but I haven't checked if you can switch that off these days).
>>
>
> MITRE,
>
> This is a new flaw, can you please assign a CVE id to this?
>
> https://bugzilla.redhat.com/show_bug.cgi?id=797096
>
> Thanks!
>
> --
> Huzaifa Sidhpurwala / Red Hat Product Security Team
Use CVE-2012-6686 for "unbound alloca use in glob_in_dir" as covered by
Red Hat Bugzilla ID 797096.
How is 797096 related to the 2e96f1c7 commit? The 2e96f1c7 commit does
not appear to be directly related to alloca usage; it concentrates on
setting "malloc_name = true" in gaih_inet(). However, a submitted patch
for Bugzilla 797096
(https://bugzilla.redhat.com/attachment.cgi?id=583711&action=diff)
performs includes much more extensive changes to gaih_inet(), modifies
other functions, and omits the "name = p;" logic that is used in 2e96f1c7.
Also, 797096 is marked as "closed" and points to RHBA-2013:0022-2, which
references CVE-2013-4357, which is RH Bug 1009643, which says "glibc:
stack overflow in getaddrinfo()'s use of alloca()."
---
CVE assignment team, MITRE CVE Numbering Authority M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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