RHEL 6 : dnsmasq (RHSA-2017:2838)

critical Nessus Plugin ID 103630
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for dnsmasq is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fix(es) :

* A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491)

Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting this issue.

Solution

Update the affected dnsmasq, dnsmasq-debuginfo and / or dnsmasq-utils packages.

See Also

https://access.redhat.com/security/vulnerabilities/3199382

https://access.redhat.com/errata/RHSA-2017:2838

https://access.redhat.com/security/cve/cve-2017-14491

Plugin Details

Severity: Critical

ID: 103630

File Name: redhat-RHSA-2017-2838.nasl

Version: 3.17

Type: local

Agent: unix

Published: 10/3/2017

Updated: 5/8/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:dnsmasq, p-cpe:/a:redhat:enterprise_linux:dnsmasq-debuginfo, p-cpe:/a:redhat:enterprise_linux:dnsmasq-utils, cpe:/o:redhat:enterprise_linux:6

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/2/2017

Vulnerability Publication Date: 10/4/2017

Exploitable With

Core Impact

Reference Information

CVE: CVE-2017-14491

RHSA: 2017:2838

IAVA: 2017-A-0284-S