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Message-ID: <CAN_LGv2Ej_YgbW=1_Ne9_rAEXR93rcM904dVWrCRCv-mPseuBg@mail.gmail.com>
Date: Mon, 5 Feb 2024 16:40:28 +0800
From: "Alexander E. Patrakov" <patrakov@...il.com>
To: oss-security@...ts.openwall.com
Cc: Qualys Security Advisory <qsa@...lys.com>, Adhemerval Zanella <adhemerval.zanella@...aro.org>
Subject: Re: Out-of-bounds read & write in the glibc's qsort()
On Mon, Feb 5, 2024 at 12:36 AM Solar Designer <solar@...nwall.com> wrote:
> It's so invasive I cannot easily tell whether qsort() remained robust
> after it or not. There's no longer a "tmp_ptr != base_ptr &&" check.
> So, lacking known-working tests in glibc tree, we don't know about glibc
> 2.39's status with respect to this issue.
>
> I don't have a glibc 2.39 build handy. Perhaps someone on a distro that
> has already updated can run the attached test program and let us know?
Here you go: no output on Arch Linux.
[aep@...-haswell tmp]$ gcc ./glibc-qualys-rocky-qsort-test.c
[aep@...-haswell tmp]$ ./a.out
[aep@...-haswell tmp]$ /lib64/libc.so.6
GNU C Library (GNU libc) stable release version 2.39.
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 13.2.1 20230801.
libc ABIs: UNIQUE IFUNC ABSOLUTE
Minimum supported kernel: 4.4.0
For bug reporting instructions, please see:
<https://gitlab.archlinux.org/archlinux/packaging/packages/glibc/-/issues>.
--
Alexander E. Patrakov
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