GNU bug report logs - #47674
dnsmasq is vulnerable to CVE-2021-3448

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Nicolò Balzarotti <anothersms <at> gmail.com>
To: bug-guix <at> gnu.org
Subject: dnsmasq is vulnerable to CVE-2021-3448
Date: Fri, 09 Apr 2021 17:10:43 +0200

[Message part 1 (text/plain, inline)]

CVE-2021-3448

A flaw was found in dnsmasq in versions before 2.85. When configured to
use a specific server for a given network interface, dnsmasq uses a
fixed port while forwarding queries. An attacker on the network, able to
find the outgoing port used by dnsmasq, only needs to guess the random
transmission ID to forge a reply and get it accepted by dnsmasq. This
flaw makes a DNS Cache Poisoning attack much easier. The highest threat
from this vulnerability is to data integrity.

guix ships dnsmasq <at> 2.84. guix refresh shows version 2.85 is available,
and there are 43 dependent packages so this can go directly to master.

All dependent packages (refresh -l) build fine except for
python2-libvirt <at> 7.2.0, which is failing also on master
(libvirt-python requires Python >= 3.5 to build).  Since it's a python2
package and no other packages depends on it, can we just drop it?

Thanks, Nicolò

[0001-gnu-dnsmasq-Update-to-2.85.patch (text/x-patch, attachment)]

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