#47420 - binutils is vulnerable to CVE-2021-20197 (and various others)

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

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From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
To: Maxime Devos <maximedevos@telenet.be>
Subject: Re: bug#47420: binutils is vulnerable to CVE-2021-20197 (and
 various others)
References: <669bea321d23f39ac5bb902dc930f4056f07ec78.camel@zaclys.net>
 <d12edf9cd3c7a6779c25ccd40411c16292406e8d.camel@telenet.be>
Date: Tue, 22 Mar 2022 22:31:06 -0400
In-Reply-To: <d12edf9cd3c7a6779c25ccd40411c16292406e8d.camel@telenet.be>
 (Maxime Devos's message of "Sat, 27 Mar 2021 00:00:40 +0100")
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Cc: 47420-done@debbugs.gnu.org,
 Léo Le Bouter <lle-bout@zaclys.net>
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Hi,

Maxime Devos <maximedevos@telenet.be> writes:

> On Fri, 2021-03-26 at 21:41 +0100, Léo Le Bouter via Bug reports for GNU Guix wrote:
>> CVE-2021-20197	18:15
>> There is an open race window when writing output in the following
>> utilities in GNU binutils version 2.35 and earlier:ar, objcopy, strip,
>> ranlib. When these utilities are run as a privileged user (presumably
>> as part of a script updating binaries across different users), an
>> unprivileged user can trick these utilities into getting ownership of
>> arbitrary files through a symlink.

Our current version of binutilsis now 2.37, immune to the CVE reported
here.

Thanks for the report!

Closing.

Maxim

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#47420 binutils is vulnerable to CVE-2021-20197 (and various others)