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

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Message-ID: <CAAHcKrojrGgRSgL=0_YarfrzM5nT89rG_-qa43gbD3XZs37UFg@mail.gmail.com>
Date: Wed, 21 May 2014 16:18:38 +0100
From: Jeff Sergeant <jeffuk@...il.com>
To: fulldisclosure@...lists.org
Subject: Re: [FD] Beginners error: Hewlett-Packards driver software executes
 rogue binary C:\Program.exe

It's very limited use.  But it is a vulnerability. . If an Unprivileged
user can write to the root of c: but NOT to any sensitive subdirectory they
can't do much harm.  This allows them a route to escalate their priveleges.

Admittedly. ..  for a user to be able to write to c but not write to
Windows/program files anyway (and overwrite whatever they want) is a bit of
an edge case but it might crop up in a pen test!
On 21 May 2014 05:58, "Tavis Ormandy" <taviso@...xchg8b.com> 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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