full-disclosure - Re: [FD] Beginners error: Hewlett-Packards driver software executes rogue binary C:\Program.exe

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Date: Wed, 21 May 2014 10:01:15 -0700
From: coderaptor <coderaptor@...il.com>
To: Tavis Ormandy <taviso@...xchg8b.com>
Cc: "fulldisclosure@...lists.org" <fulldisclosure@...lists.org>
Subject: Re: [FD] Beginners error: Hewlett-Packards driver software executes
 rogue binary C:\Program.exe

If the fix is trivial, I'd rather fix it, regardless of the conclusion
of "security-or-not" pissing match.

I partially agree with Travis in the ACL argument, but also would like
to note that half of humanity logs in a Windows machine as
Administrator, as well as clicks on hyperlinks that purport to have
photos of a nekkid celebrity. And it definitely does not look good on
part of hp to dismiss the issue because they don't consider it worthy
enough of a fix. Let me guess - the logistics is a nightmare, hp
probably has a n x m matrix that they'd have to issue fix for, which
quickly explodes into upper two or even three digit numbers.

-coderaptor

On Wed, May 21, 2014 at 6:57 AM, Tavis Ormandy <taviso@...xchg8b.com> wrote:
> On 21 May 2014 02:13, Project Un1c0rn <project.un1c0rn@...dex.com> wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> I really don't get those kind of arguments.
>>
>
> It's simple, if your exploit requires Administrator access, then it's
> probably not a security issue. Filesystem ACLs are a supported
> security boundary, being able to defeat them would be a legitimate and
> important vulnerability. Inventing attacks that require them to fail
> as a pre-requisite is like saying "If you can modify /etc/passwd,
> then...".
>
> Hopefully you agree that using your Administrator access to replace or
> modify system files or settings is not a security issue.
>
>> If there's a risk that combined with some other flaw that can be
>> exploited later (dunno, dropping NEW exe in the root for eg.), fix the
>> risk.
>
> The bug would be being able to defeat filesystem ACLs; if you have a
> way of doing that without Administrator access, you have a security
> bug. That doesn't need to be combined with anything else, it's a
> serious vulnerability.
>
>> Security is not thinking, naaaah should be ok nobody can touch that
>> dir ... or noooo plain text passwords are OK because my db is on a
>> private network ...
>>
>> Damn it ... No kidding there's thousands of systems out there
>> vulnerable because they think cloudflare protects them.
>>
>> Think for yourself ... Hackers don't take you with one single point of
>> failure, they combine them.
>>
>
> Uh, Thanks, I'll keep that in mind.
>
>> - ---------
>>
>> Project Un1c0rn
>> http://un1c0rn.net
>> http://unicorntufgvuhbi.onion
>>
>> On 05/21/2014 06:10 AM, Tavis Ormandy wrote:
>>> "Stefan Kanthak" <stefan.kanthak@...go.de> wrote:
>>>
>>>> Hi @ll,
>>>>
>>>> several programs of the current Windows 7 driver software for the
>>>> "HP OfficeJet 6700" multifunction device execute a rogue program
>>>> C:\Program.exe
>>>>
>>>>
>>>
>>> It sounds like a bug, but why is this a security issue? I can only
>>> imagine two possible scenarios
>>>
>>> 1. You've somehow made the root parition FAT32, in which case
>>> you're using a non-securable filesystem; Therefore not a security
>>> issue. 2. You've set a bad ACL on the root directory, therefore
>>> user error.
>>>
>>> If you believe otherwise, please post details, as that would be an
>>> interesting discovery.
>>>
>>> Tavis.
>>>
>>>
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>
>
>
> --
> -------------------------------------
> taviso@...xchg8b.com | pgp encrypted mail preferred
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>
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