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Red Hat Enterprise Linux 7.6 RHSA-2021:0155-01 Moderate: Dnsmasq Risk

An update for dnsmasq is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: dnsmasq security update Advisory ID: RHSA-2021:0155-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0155 Issue date: 2021-01-19 CVE Names: CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 ==================================================================== 1. Summary: An update for dnsmasq is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x 3. Description: The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es): * dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25684) * dnsmasq: loose query name check inreply_query() makes forging replies easier for an off-path attacker (CVE-2020-25685) * dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker (CVE-2020-25686) 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. 4. 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1889686 - CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker 1889688 - CVE-2020-25685 dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker 1890125 - CVE-2020-25686 dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.6): Source: dnsmasq-2.76-7.el7_6.2.src.rpm x86_64: dnsmasq-2.76-7.el7_6.2.x86_64.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6): x86_64: dnsmasq-debuginfo-2.76-7.el7_6.2.x86_64.rpm dnsmasq-utils-2.76-7.el7_6.2.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.6): Source: dnsmasq-2.76-7.el7_6.2.src.rpm ppc64: dnsmasq-2.76-7.el7_6.2.ppc64.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64.rpm ppc64le: dnsmasq-2.76-7.el7_6.2.ppc64le.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64le.rpm s390x: dnsmasq-2.76-7.el7_6.2.s390x.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.s390x.rpm x86_64: dnsmasq-2.76-7.el7_6.2.x86_64.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v.7): Source: dnsmasq-2.76-7.el7_6.2.src.rpm aarch64: dnsmasq-2.76-7.el7_6.2.aarch64.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.aarch64.rpm ppc64le: dnsmasq-2.76-7.el7_6.2.ppc64le.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64le.rpm s390x: dnsmasq-2.76-7.el7_6.2.s390x.rpm dnsmasq-debuginfo-2.76-7.el7_6.2.s390x.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.6): ppc64: dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64.rpm dnsmasq-utils-2.76-7.el7_6.2.ppc64.rpm ppc64le: dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64le.rpm dnsmasq-utils-2.76-7.el7_6.2.ppc64le.rpm s390x: dnsmasq-debuginfo-2.76-7.el7_6.2.s390x.rpm dnsmasq-utils-2.76-7.el7_6.2.s390x.rpm x86_64: dnsmasq-debuginfo-2.76-7.el7_6.2.x86_64.rpm dnsmasq-utils-2.76-7.el7_6.2.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7): aarch64: dnsmasq-debuginfo-2.76-7.el7_6.2.aarch64.rpm dnsmasq-utils-2.76-7.el7_6.2.aarch64.rpm ppc64le: dnsmasq-debuginfo-2.76-7.el7_6.2.ppc64le.rpm dnsmasq-utils-2.76-7.el7_6.2.ppc64le.rpm s390x: dnsmasq-debuginfo-2.76-7.el7_6.2.s390x.rpm dnsmasq-utils-2.76-7.el7_6.2.s390x.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/ 7. References: https://access.redhat.com/security/cve/CVE-2020-25684 https://access.redhat.com/security/cve/CVE-2020-25685 https://access.redhat.com/security/cve/CVE-2020-25686 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/vulnerabilities/RHSB-2021-001 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPGv1 iQIVAwUBYAboDtzjgjWX9erEAQiLag//YhXcBUOW0sEQ8k06WYSM8OkrXPNB0+Uq 53L0qcvoOWtSIkwV1CgVsHuLTXRPyelw4l/I3hZED+ACfEOUzGqYJOoWnc2HT712 e6rf5x8NVQpWpGLJbePFasiZ4b9Oe2cbpeveWUnJJyJ+9A/SKsAeANvvzvFIvPah le699qONS1DpTqS5v1vU7qqN0ZcdEdC83CeRjeYOoFx1+a9izFg9eKPyr3RdsrjF ze9Dv+6ZeCorrwMa9fyEVtmT91vmOGy6/1f2/9YlI9j/tjDfhv4HdlbHL0u2Eg2z eBaAkitgzgZ46L63hm6fNmTs9cO1AW+c8STkFjcv44vz4MJEQ60K2NiOqvuhm7ba GgU0rAJD1cPnHrriJ4DytwDpgGOhoC2a637mt0onni0U6ZZmvcVIkVY1m7muCyVr Vry4ViX/LrBgw+C46NTKHIlgZm2IzVH/OkgLpvXmf+SoQqQoiI75QaeTe432X9ie Ot9z14n5OFOwcAvOwnzUUIAR3oOxQfyhby8tgN+bRsIFOmYceYkocwc7DWGJQ+Zk mInUwGaEVAPkZzmTgxTjc5BGFdb9Ojsl32g1KbLAUv4SaUZtYzwGUxh0sMwEG5eY 8JqCsJP+4BDFBd70g7KZDdUkySJ0v3gb5+PS7KqnnRtYJb81Dl6FBxNc7x9KL8cG 3tTxc1zVYbM=RW1Z -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . Red Hat Enterprise Linux (RHEL) has enhanced security protocols for dnsmasq, addressing critical vulnerabilities to safeguard stability and confidentiality of services. dnsmasq Security Update, Red Hat Update, Linux Server Security, Network Service Patch. . LinuxSecurity.com Team

Jan 19, 2021 Red Hat