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Date: Wed, 19 Sep 2012 10:58:01 +0400
From: Alexander Cherepanov <cherepan@...me.ru>
To: john-dev@...ts.openwall.com
Subject: Re: Static analysis of John using Coverity
On 2012-09-19 01:15, Alexander Cherepanov wrote:
> On 2012-09-17 01:23, Alexander Cherepanov wrote:
>> And I suspect that every format with trivial valid() -- there are
>> ~40-50 of them -- have buffer overflows in get_salt and/or similar
>> functions. You don't need a code analyzer to find them.
>
> To have something for a start here are crashers for 36 formats:
[skip]
> They crash fresh magnum-john built linux-x86-64i. Didn't take time to
^ for ^ I
> really trigger buffer overflows in all these cases. And I didn't look at
> cuda and opencl formats at all.
If forgot to include several cases. john crashes on this:
$DIGEST-MD5$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$$$$$auth$
john overflows dynamic buffer, supposedly overwrites test vectors and
then fails self-test on this:
$response$$$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$$$$$
john crashes while reading file consisting of two lines:
$B$$0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
$B$$0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
john --format=dynamic_21 crashes on this:
00000000000000000000000000000000
(it doesn't crash without --format).
--
Alexander Cherepanov
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