From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: Paul Koning <paulkoning@comcast.net>
Cc: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>,
Nick Clifton <nickc@redhat.com>,
Binutils <binutils@sourceware.org>,
"gdb@sourceware.org" <gdb@sourceware.org>
Subject: Re: RFC: Adding a SECURITY.md document to the Binutils
Date: Thu, 13 Apr 2023 12:02:58 -0400 [thread overview]
Message-ID: <a372dad1-5c51-df93-de11-5becf6c09e02@gotplt.org> (raw)
In-Reply-To: <E76CA0FA-92DC-4AD0-99D1-5A38D3FE749C@comcast.net>
On 2023-04-13 11:08, Paul Koning wrote:
>
>
>> On Apr 13, 2023, at 11:02 AM, Siddhesh Poyarekar <siddhesh@gotplt.org> wrote:
>>
>> On 2023-04-13 10:50, Richard Earnshaw wrote:
>>> No, whilst elf can be executed, objdump should never be doing that: it's a tool for examining a file, not running it. You have to have a tool that can safely examine the contents of an elf file or you can never verify it for issues - opening it up in emacs to examine the contents is not the way to do that :)
>>
>> You can verify it for issues, in a sandbox.
>>
>>> But all that is beside the point. The original case I gave was a /corrupt/ elf file that caused a buffer overrun in the objdump binary.
>>
>> ... and that's a robustness issue. Any buffer overrun in any program could in theory be exploited to send out files.
>
> No. Buffer overruns are generally recognized as security issues, precisely because they (often) can be used to produce arbitrary code execution exploits.
They're a common security exploit vector, but context matters. If you
have local access to a system, you can already execute arbitrary code; a
buffer overrun itself is not going to help you do anything that you
couldn't already do. By letting in an untrusted file or by accepting
inputs over a network, you're opening up a *new* vector to actually
exploit the buffer overflow to do something you couldn't already do.
> A buiffer overrun would be merely a robustness issue if it is guaranteed to cause nothing worse than a program abort.
Context matters here too. Over a network or under some circumstances
with other kinds of untrusted input (such as downloaded files), a simple
program abort will result in a DoS, which is a security issue.
Sid
next prev parent reply other threads:[~2023-04-13 16:03 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-07 8:42 Nick Clifton
2023-04-07 10:36 ` Eli Zaretskii
2023-04-11 13:29 ` Nick Clifton
2023-04-11 14:23 ` Simon Marchi
2023-04-11 15:00 ` Eli Zaretskii
2023-04-11 16:22 ` Nick Clifton
2023-04-11 16:32 ` Matt Rice
2023-04-11 18:18 ` J.W. Jagersma
2023-04-12 8:43 ` Nick Clifton
2023-04-08 6:30 ` Jan Beulich
2023-04-10 18:30 ` John Baldwin
2023-04-20 15:56 ` Nick Clifton
2023-04-11 19:45 ` Ian Lance Taylor
2023-04-12 16:02 ` Richard Earnshaw
2023-04-12 16:26 ` Siddhesh Poyarekar
2023-04-12 16:52 ` Richard Earnshaw
2023-04-12 16:58 ` Paul Koning
2023-04-12 17:10 ` Siddhesh Poyarekar
2023-04-13 3:51 ` Alan Modra
2023-04-13 4:25 ` Siddhesh Poyarekar
2023-04-13 5:16 ` Alan Modra
2023-04-13 12:00 ` Siddhesh Poyarekar
2023-04-13 10:25 ` Richard Earnshaw
2023-04-13 11:53 ` Siddhesh Poyarekar
2023-04-13 12:37 ` Richard Earnshaw
2023-04-13 12:54 ` Siddhesh Poyarekar
2023-04-13 13:11 ` Richard Earnshaw
2023-04-13 13:35 ` Siddhesh Poyarekar
2023-04-13 13:40 ` Richard Earnshaw
2023-04-13 13:56 ` Siddhesh Poyarekar
2023-04-13 14:50 ` Richard Earnshaw
2023-04-13 15:02 ` Siddhesh Poyarekar
2023-04-13 15:05 ` Richard Earnshaw
2023-04-13 16:42 ` Siddhesh Poyarekar
2023-04-14 9:52 ` Richard Earnshaw
2023-04-14 12:43 ` Siddhesh Poyarekar
2023-04-14 12:49 ` Richard Earnshaw
2023-04-14 13:13 ` Siddhesh Poyarekar
2023-04-13 15:08 ` Paul Koning
2023-04-13 16:02 ` Siddhesh Poyarekar [this message]
2023-04-13 16:49 ` Paul Koning
2023-04-13 17:00 ` Siddhesh Poyarekar
2023-04-13 17:05 ` Paul Koning
2023-04-13 17:29 ` Siddhesh Poyarekar
2023-04-13 17:37 ` Paul Koning
2023-04-13 18:16 ` Siddhesh Poyarekar
2023-04-14 17:37 ` Ian Lance Taylor
2023-04-14 18:27 ` Siddhesh Poyarekar
2023-04-14 20:46 ` Ian Lance Taylor
2023-04-14 21:24 ` Siddhesh Poyarekar
2023-04-17 15:31 ` Michael Matz
2023-04-17 19:55 ` Ian Lance Taylor
2023-04-14 19:45 ` DJ Delorie
2023-04-14 20:49 ` Ian Lance Taylor
2023-04-15 6:41 ` Xi Ruoyao
2023-04-13 16:06 ` Richard Earnshaw
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