RHEL 5 : dnsmasq (RHSA-2017:2840)

critical Nessus Plugin ID 103632
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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 5 Extended Lifecycle Support.

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 and / or dnsmasq-debuginfo packages.

See Also

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

http://rhn.redhat.com/errata/RHSA-2017-2840.html

https://www.redhat.com/security/data/cve/CVE-2017-14491.html

Plugin Details

Severity: Critical

ID: 103632

File Name: redhat-RHSA-2017-2840.nasl

Version: 3.8

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: Critical

Base Score: 10

Temporal Score: 7.8

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:dnsmasq, p-cpe:/a:redhat:enterprise_linux:dnsmasq-debuginfo, cpe:/o:redhat:enterprise_linux:5

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

Exploitable With

Core Impact

Reference Information

CVE: CVE-2017-14491

RHSA: 2017:2840

IAVA: 2017-A-0284-S