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Red Hat: RHSA-2020-3878-01 Low: Dnsmasq Memory Leak Fix

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
New patch released for dnsmasq on Red Hat. Information regarding minor severity and memory leak flaw has been addressed.
An update for dnsmasq is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.
Security Fix(es):
* dnsmasq: memory leak in the create_helper() function in /src/helper.c (CVE-2019-14834)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix memory leak low severity dnsmasq

References

https://access.redhat.com/security/cve/CVE-2019-14834 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: dnsmasq-2.76-16.el7.src.rpm
x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: dnsmasq-2.76-16.el7.src.rpm
x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: dnsmasq-2.76-16.el7.src.rpm
ppc64: dnsmasq-2.76-16.el7.ppc64.rpm dnsmasq-debuginfo-2.76-16.el7.ppc64.rpm
ppc64le: dnsmasq-2.76-16.el7.ppc64le.rpm dnsmasq-debuginfo-2.76-16.el7.ppc64le.rpm
s390x: dnsmasq-2.76-16.el7.s390x.rpm dnsmasq-debuginfo-2.76-16.el7.s390x.rpm
x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64: dnsmasq-debuginfo-2.76-16.el7.ppc64.rpm dnsmasq-utils-2.76-16.el7.ppc64.rpm
ppc64le: dnsmasq-debuginfo-2.76-16.el7.ppc64le.rpm dnsmasq-utils-2.76-16.el7.ppc64le.rpm
s390x: dnsmasq-debuginfo-2.76-16.el7.s390x.rpm dnsmasq-utils-2.76-16.el7.s390x.rpm
x86_64:

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3878-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3878
Issue date: 2020-09-29

Topic

An update for dnsmasq is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix memory leak low severity dnsmasq

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1752569 - [RHEL-7] Change dhcp_release to use default address when no IP subnet matches

1755610 - dnsmasq not returning REFUSED to DNS queries without the recursion bit set

1757247 - DHCPv6 relay-fwd requests are ignored by dnsmasq

1764425 - CVE-2019-14834 dnsmasq: memory leak in the create_helper() function in /src/helper.c

1815080 - Stop treating SERVFAIL as a successful response from upstream servers

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