-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: dnsmasq security update Advisory ID: RHSA-2021:0152-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0152 Issue date: 2021-01-19 CVE Names: CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 CVE-2020-25687 ==================================================================== 1. Summary: An update for dnsmasq is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. 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 AppStream EUS (v. 8.1) - aarch64, ppc64le, s390x, 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: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled (CVE-2020-25681) * dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled (CVE-2020-25682) * dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled (CVE-2020-25683) * 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) * dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled (CVE-2020-25687) 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/): 1881875 - CVE-2020-25681 dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled 1882014 - CVE-2020-25682 dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled 1882018 - CVE-2020-25683 dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled 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 1891568 - CVE-2020-25687 dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled 6. Package List: Red Hat Enterprise Linux AppStream EUS (v. 8.1): Source: dnsmasq-2.79-6.el8_1.1.src.rpm aarch64: dnsmasq-2.79-6.el8_1.1.aarch64.rpm dnsmasq-debuginfo-2.79-6.el8_1.1.aarch64.rpm dnsmasq-debugsource-2.79-6.el8_1.1.aarch64.rpm dnsmasq-utils-2.79-6.el8_1.1.aarch64.rpm dnsmasq-utils-debuginfo-2.79-6.el8_1.1.aarch64.rpm ppc64le: dnsmasq-2.79-6.el8_1.1.ppc64le.rpm dnsmasq-debuginfo-2.79-6.el8_1.1.ppc64le.rpm dnsmasq-debugsource-2.79-6.el8_1.1.ppc64le.rpm dnsmasq-utils-2.79-6.el8_1.1.ppc64le.rpm dnsmasq-utils-debuginfo-2.79-6.el8_1.1.ppc64le.rpm s390x: dnsmasq-2.79-6.el8_1.1.s390x.rpm dnsmasq-debuginfo-2.79-6.el8_1.1.s390x.rpm dnsmasq-debugsource-2.79-6.el8_1.1.s390x.rpm dnsmasq-utils-2.79-6.el8_1.1.s390x.rpm dnsmasq-utils-debuginfo-2.79-6.el8_1.1.s390x.rpm x86_64: dnsmasq-2.79-6.el8_1.1.x86_64.rpm dnsmasq-debuginfo-2.79-6.el8_1.1.x86_64.rpm dnsmasq-debugsource-2.79-6.el8_1.1.x86_64.rpm dnsmasq-utils-2.79-6.el8_1.1.x86_64.rpm dnsmasq-utils-debuginfo-2.79-6.el8_1.1.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-2020-25681 https://access.redhat.com/security/cve/CVE-2020-25682 https://access.redhat.com/security/cve/CVE-2020-25683 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/cve/CVE-2020-25687 https://access.redhat.com/security/updates/classification/#important 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 iQIVAwUBYAbepdzjgjWX9erEAQhK0g/9F6hzOsmqxMPcgOvWjgi/c4Yl7oamXCbh Lxv8Ytxrbov8l4idixd9Nmq1AuvWU83JvfCsDN3mkxmqK3cDf4D30DlFxFfzd1dF rjqpdY1WCmWp3dnKclXlwc7Q25X3owjsXTkZwg5RxHi4AEMdE9ACvz5lp3djGXc5 SMIjD04UG5kqdwo97IrOj3ucTztg6Fq9jq92P/Q8L4iz+0fKKu4Lsy9O7lgKDoma uSOduPeqH43BVGg0ADFJ/AvHgnkSLFX/OUhf21FLaGLqci+1YVp3Zzr45Nk1FsRj bhdytI3hLgNCFanF4sH2/2y7AvEPYimwK1Xv5oEeH2UrfBACbJyCF1a7uQocH0R2 pHkcT157+0pr/dtq1Dr6JcDXjPjph0TcyIFzCVvVgO7O0Vb3fdE7E1I95H9TR4XF +rpIejgq7+ECwIin7cY6rUNtywXNth/qIGGkMrYzsrfoArnOIWJlZtOptkZeWm1F rgvWB30x2pbFsEzubVwiBx118R2qBkR943dTcMEux/6WTS9gkFkMWCDrNzADj35a bgLhQdGHuG/QqLwN24FRYE+OzQwIQ+7IHwR4AttuUDN93k0H6cKEeHqGBb5tZyNs 4CVAneGK/kPIAJ/DI4R8lastfjOHgOpu8ZVkr0uXbqd3jnFs9nv8+7YNDbNs5l1v t8hvuxEPrIY=KmZn -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce