From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
ALT Linux Team development discussions
<devel@lists.altlinux.org>, "Dmitry V. Levin" <ldv@altlinux.org>,
"Konstantin A. Lepikhov" <lakostis@unsafe.ru>,
Michail Yakushin <silicium@altlinux.org>
Subject: Re: [devel] suid binaries and ELF Auxiliary Vectors
Date: Fri, 25 Sep 2009 11:23:47 +0300
Message-ID: <cc557aab0909250123k361f438fk3efd13753fcbd434@mail.gmail.com> (raw)
In-Reply-To: <cc557aab0909250115x774e7d49n6dc4c036697cad31@mail.gmail.com>
On Fri, Sep 25, 2009 at 11:15 AM, Kirill A. Shutemov
<kirill@shutemov.name> wrote:
> 2009/9/25 Konstantin A. Lepikhov <lakostis@unsafe.ru>:
>> http://people.redhat.com/drepper/elftut1.ps -
>
> Thanks for link.
>
>> "The function create_elf_tables is responsible for
>> creating the user stack which includes creating the auxiliary vector."
>
> Yep, I see. It really creates auxv on suid binaries. At least it reaches
> copy_to_user(sp, elf_info, ei_index * sizeof(elf_addr_t))
> But still there is no auxv in userspace. :(
>
It seems problem is in glibc. When I compiled similar code with
klibc, it works fine.
Dmitry, could you comment it? Probably, it's security-related
thing. What's the point?
next prev parent reply other threads:[~2009-09-25 8:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-25 7:38 Kirill A. Shutemov
2009-09-25 8:15 ` Kirill A. Shutemov
2009-09-25 8:23 ` Kirill A. Shutemov [this message]
2009-09-25 9:12 ` Dmitry V. Levin
2009-09-25 9:24 ` Sergey Vlasov
2009-09-25 10:05 ` Kirill A. Shutemov
2009-09-25 10:20 ` Kirill A. Shutemov
2009-09-25 9:29 ` Andrey Rahmatullin
2009-09-25 9:35 ` Dmitry V. Levin
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