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Re: [PATCH] CVE-2014-8121: Fix nss_files file management [BZ#18007]
- From: Florian Weimer <fweimer at redhat dot com>
- To: Andreas Schwab <schwab at suse dot de>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Mon, 23 Feb 2015 13:02:58 +0100
- Subject: Re: [PATCH] CVE-2014-8121: Fix nss_files file management [BZ#18007]
- Authentication-results: sourceware.org; auth=none
- References: <54EB120A dot 1010202 at redhat dot com> <mvm7fv8hm71 dot fsf at hawking dot suse dot de>
On 02/23/2015 01:00 PM, Andreas Schwab wrote:
> Florian Weimer <fweimer@redhat.com> writes:
>
>> Robin Hack discovered that Samba would enter an infinite loop when
>> processing quota-related requests. It turns out this is a bug in the
>> nss_files database. Performing a lookup in the middle of an iteration
>> (say, getwuid between getpwent) effectively resets the file pointer, so
>> that the iteration starts again from the beginning.
>>
>> Tested on x86_64-redhat-linux-gnu. Okay to commit?
>
> That doesn't fix the bug. It still fails with a nis config.
Ugh, could you please elaborate?
--
Florian Weimer / Red Hat Product Security