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Re: BASH recursion segfault, FUNCNEST doesn't help
From: |
Chet Ramey |
Subject: |
Re: BASH recursion segfault, FUNCNEST doesn't help |
Date: |
Mon, 6 Jun 2022 09:57:50 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 |
On 6/1/22 4:49 PM, Gergely wrote:
Hi,
I stumbled upon a recursion overflow crash in BASH. It affects both my
Debian machine (this report), as well as the latest stable built from
source.
Yes, you created an infinitely recursive script. It's a race to see whether
you exceed your stack or VM resource limit first. Since you're not
executing within a shell function, FUNCNEST has no effect.
There's a slim chance this might be exploitable.
I'm skeptical.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- BASH recursion segfault, FUNCNEST doesn't help, Gergely, 2022/06/01
- Re: BASH recursion segfault, FUNCNEST doesn't help, Martin Schulte, 2022/06/01
- Re: BASH recursion segfault, FUNCNEST doesn't help, Gergely, 2022/06/02
- Re: BASH recursion segfault, FUNCNEST doesn't help, Ángel, 2022/06/04
- Re: BASH recursion segfault, FUNCNEST doesn't help, Chet Ramey, 2022/06/06
- Re: BASH recursion segfault, FUNCNEST doesn't help, Gergely, 2022/06/07
- Re: BASH recursion segfault, FUNCNEST doesn't help, Chet Ramey, 2022/06/07
- Re: BASH recursion segfault, FUNCNEST doesn't help, Gergely, 2022/06/07
- Re: BASH recursion segfault, FUNCNEST doesn't help, Chet Ramey, 2022/06/09
Re: BASH recursion segfault, FUNCNEST doesn't help,
Chet Ramey <=