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Red Hat: RHSA-2021-4153-01 Moderate: dnsmasq Security Fix

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
dnsmasq update for CentOS Linux addresses several medium-level vulnerabilities, incorporating crucial security enhancements and bug resolution measures.
An update for dnsmasq is now available for Red Hat Enterprise Linux 8

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: fixed outgoing port used when --server is used with an interface name (CVE-2021-3448)
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 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat bug fix network service dnsmasq

References

https://access.redhat.com/security/cve/CVE-2021-3448 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dnsmasq-2.79-19.el8.src.rpm
aarch64: dnsmasq-2.79-19.el8.aarch64.rpm dnsmasq-debuginfo-2.79-19.el8.aarch64.rpm dnsmasq-debugsource-2.79-19.el8.aarch64.rpm dnsmasq-utils-2.79-19.el8.aarch64.rpm dnsmasq-utils-debuginfo-2.79-19.el8.aarch64.rpm
ppc64le: dnsmasq-2.79-19.el8.ppc64le.rpm dnsmasq-debuginfo-2.79-19.el8.ppc64le.rpm dnsmasq-debugsource-2.79-19.el8.ppc64le.rpm dnsmasq-utils-2.79-19.el8.ppc64le.rpm dnsmasq-utils-debuginfo-2.79-19.el8.ppc64le.rpm
s390x: dnsmasq-2.79-19.el8.s390x.rpm dnsmasq-debuginfo-2.79-19.el8.s390x.rpm dnsmasq-debugsource-2.79-19.el8.s390x.rpm dnsmasq-utils-2.79-19.el8.s390x.rpm dnsmasq-utils-debuginfo-2.79-19.el8.s390x.rpm
x86_64: dnsmasq-2.79-19.el8.x86_64.rpm dnsmasq-debuginfo-2.79-19.el8.x86_64.rpm dnsmasq-debugsource-2.79-19.el8.x86_64.rpm dnsmasq-utils-2.79-19.el8.x86_64.rpm dnsmasq-utils-debuginfo-2.79-19.el8.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


Advisory ID: RHSA-2021:4153-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4153
Issue date: 2021-11-09

Topic

An update for dnsmasq is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. 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 moderate security issue Red Hat bug fix network service dnsmasq

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1921153 - failed to send packet: Network is unreachable when resolution is busy.

1927973 - dnsmasq --bind-dynamic stops replying to upstream queries

1939368 - CVE-2021-3448 dnsmasq: fixed outgoing port used when --server is used with an interface name

1947039 - typo in dnsmasq man page

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