-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: dnsmasq security update Advisory ID: RHSA-2021:0153-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0153 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. 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 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 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 in reply_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 Client (v. 7): Source: dnsmasq-2.76-16.el7_9.1.src.rpm x86_64: dnsmasq-2.76-16.el7_9.1.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm dnsmasq-utils-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: dnsmasq-2.76-16.el7_9.1.src.rpm x86_64: dnsmasq-2.76-16.el7_9.1.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm dnsmasq-utils-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: dnsmasq-2.76-16.el7_9.1.src.rpm ppc64: dnsmasq-2.76-16.el7_9.1.ppc64.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.ppc64.rpm ppc64le: dnsmasq-2.76-16.el7_9.1.ppc64le.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.ppc64le.rpm s390x: dnsmasq-2.76-16.el7_9.1.s390x.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.s390x.rpm x86_64: dnsmasq-2.76-16.el7_9.1.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: dnsmasq-debuginfo-2.76-16.el7_9.1.ppc64.rpm dnsmasq-utils-2.76-16.el7_9.1.ppc64.rpm ppc64le: dnsmasq-debuginfo-2.76-16.el7_9.1.ppc64le.rpm dnsmasq-utils-2.76-16.el7_9.1.ppc64le.rpm s390x: dnsmasq-debuginfo-2.76-16.el7_9.1.s390x.rpm dnsmasq-utils-2.76-16.el7_9.1.s390x.rpm x86_64: dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm dnsmasq-utils-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: dnsmasq-2.76-16.el7_9.1.src.rpm x86_64: dnsmasq-2.76-16.el7_9.1.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7_9.1.x86_64.rpm dnsmasq-utils-2.76-16.el7_9.1.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/ 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: GnuPG v1 iQIVAwUBYAblHdzjgjWX9erEAQg6Xg//fXZBawqLgCXhC7jToJJgUA+WoERkMbil Vs5+OP4vp+nT2iA92mQ84rLTQG2tL2xhPfMxLVl+9aCH44RjJjmQ8F/ODvYxRCe4 MopmumQIwfGMAFK/n16jHAmkg+qMZa3ehUp+LuawnsIuGtC7BmiohLTZqjxFj754 6h79AhB8/zeX1buyqEBgo8kCTy/L+TRW/Xg/ENi6a6NTnwG3f2n89oxUOCASm2cA YF2Qc1L8yqd/5YXBA8E3gRouBe2caThWUo0qrG9ois7lYIJKlxzo9sq3n6qfc8bN hZ/OAKvNSnRSrC4AW8kHVskv0hR8kC+iX05ryujBdGRLiafHl9hLGy2E0qRR3mm3 hNyjhKzBNxwZZ3gF8nOQJyWtxSYJSwbl6n01ElEs+QexMKi/f+x8hML1BS1rf/tG JuOOyLTUGjWIdmmLEKNQa/A5h0rWwJhNhVKuK+iNGXTey8C1JmeNaYpeOn8JdK1E iS8ZT48mfu8MxvGVVbv8ARfMQtsWSo1IOMD/ttUh2SPflZ1Qpd2sGTR5sIJrq2JD XlWePyzEQSL0UEJ8FgYOeJJEt9Q/gWgiug7ZBZrmanzLaNv0DA0dLsD8kE/p2mml j6kxe9R0XnpTxnDTzKmmCaEXCFsrJIg872+57VfVbCeFcwV6pZMNMFACmMI6DJgX sGV/jc2cn78=iw2j -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce