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Gentoo: GLSA-202101-17: Dnsmasq: Multiple vulnerabilities

Date 22 Jan 2021
175
Posted By LinuxSecurity Advisories
Multiple vulnerabilities have been found in Dnsmasq, the worst of which may allow remote attackers to execute arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 202101-17
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Dnsmasq: Multiple vulnerabilities
     Date: January 22, 2021
     Bugs: #766126
       ID: 202101-17

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Synopsis
========

Multiple vulnerabilities have been found in Dnsmasq, the worst of which
may allow remote attackers to execute arbitrary code.

Background
==========

Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP
server.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-dns/dnsmasq               < 2.83                     >= 2.83

Description
===========

Multiple vulnerabilities have been discovered in Dnsmasq. Please review
the references below for details.

Impact
======

An attacker, by sending specially crafted DNS replies, could possibly
execute arbitrary code with the privileges of the process, perform a
cache poisoning attack or cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Dnsmasq users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.83"

References
==========

[ 1 ] CVE-2020-25681
      https://nvd.nist.gov/vuln/detail/CVE-2020-25681
[ 2 ] CVE-2020-25682
      https://nvd.nist.gov/vuln/detail/CVE-2020-25682
[ 3 ] CVE-2020-25683
      https://nvd.nist.gov/vuln/detail/CVE-2020-25683
[ 4 ] CVE-2020-25684
      https://nvd.nist.gov/vuln/detail/CVE-2020-25684
[ 5 ] CVE-2020-25685
      https://nvd.nist.gov/vuln/detail/CVE-2020-25685
[ 6 ] CVE-2020-25686
      https://nvd.nist.gov/vuln/detail/CVE-2020-25686
[ 7 ] CVE-2020-25687
      https://nvd.nist.gov/vuln/detail/CVE-2020-25687

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202101-17

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2021 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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