RedHat: RHSA-2020-3878:01 Low: dnsmasq security and bug fix update
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.
Summary
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
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:
dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm
dnsmasq-utils-2.76-16.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (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 Workstation Optional (v. 7):
x86_64:
dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm
dnsmasq-utils-2.76-16.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
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.
Topic
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