bug#47144: security patching of 'patch' package

[Mark H Weaver]

I'm forwarding this to bug-guix@gnu.org so that it won't be forgotten.

       Mark

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Subject: security patching of 'patch' package
From: Léo Le Bouter <lle-bout@zaclys.net>
To: guix-devel@gnu.org
Date: Wed, 10 Mar 2021 04:14:35 +0100

Hello!

I could find that the 'patch' package was vulnerable to numerous CVEs
that other distros like Debian have patched. Here's the list reported
by 'guix lint -c cve patch':

patch@2.7.6: probably vulnerable to CVE-2019-13636, CVE-2019-13638,
CVE-2019-20633, CVE-2018-1000156, CVE-2018-20969, CVE-2018-6951, CVE-
2018-6952

Can I use latest commit from master to build 'patch' then graft
original package?

i.e. https://git.savannah.gnu.org/git/patch.git

There's not that many commits since last release, but lots of time: 
https://git.savannah.gnu.org/cgit/patch.git/log/

Thank you,
Léo

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