-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: dnsmasq security update Advisory ID: RHSA-2021:0150-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0150 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. 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 (v. 8) - 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 (v. 8): Source: dnsmasq-2.79-13.el8_3.1.src.rpm aarch64: dnsmasq-2.79-13.el8_3.1.aarch64.rpm dnsmasq-debuginfo-2.79-13.el8_3.1.aarch64.rpm dnsmasq-debugsource-2.79-13.el8_3.1.aarch64.rpm dnsmasq-utils-2.79-13.el8_3.1.aarch64.rpm dnsmasq-utils-debuginfo-2.79-13.el8_3.1.aarch64.rpm ppc64le: dnsmasq-2.79-13.el8_3.1.ppc64le.rpm dnsmasq-debuginfo-2.79-13.el8_3.1.ppc64le.rpm dnsmasq-debugsource-2.79-13.el8_3.1.ppc64le.rpm dnsmasq-utils-2.79-13.el8_3.1.ppc64le.rpm dnsmasq-utils-debuginfo-2.79-13.el8_3.1.ppc64le.rpm s390x: dnsmasq-2.79-13.el8_3.1.s390x.rpm dnsmasq-debuginfo-2.79-13.el8_3.1.s390x.rpm dnsmasq-debugsource-2.79-13.el8_3.1.s390x.rpm dnsmasq-utils-2.79-13.el8_3.1.s390x.rpm dnsmasq-utils-debuginfo-2.79-13.el8_3.1.s390x.rpm x86_64: dnsmasq-2.79-13.el8_3.1.x86_64.rpm dnsmasq-debuginfo-2.79-13.el8_3.1.x86_64.rpm dnsmasq-debugsource-2.79-13.el8_3.1.x86_64.rpm dnsmasq-utils-2.79-13.el8_3.1.x86_64.rpm dnsmasq-utils-debuginfo-2.79-13.el8_3.1.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 iQIVAwUBYAbejNzjgjWX9erEAQgk0A/9FxmnqHYE8Hn1es6TKcskQ21iW12qSOce x8cj5tx4AmJNfUx81W4liq2xT6cA70ruZiGuSWlnEdByKawopIRxTP3Nq/zFKwb1 XGIfAZe1xZtwBZSbbRsC+mROPzKaIAslmOzVXN2FIWAWSesNl6cmN8gBp8a3R+am tLj02/152ko3LhtPG/EjWWg4Gq4S4R72KH1di/AVdtaTIbF/CKdI5Hz5BjZa5tYt xNKXci6G0i8lHBAdTxXb1uUBRwuQuYIU2BVIga0vOkyTFJvSVpIkV55DJj+d9bPg 3zwVif2EyAWrOjHqa50olCyUoEfFxMywb64FscsbyOtJ5pXcaxG+QJtLRjL3SeUu ZlJkGctmuQnxDFeABux/qBl8st/i1v1+KQ6SG17MZ8hvuQK6E/KRw4fQR7qgczFG AbpNnIBSxKGtI2e1WQCE82PJ2ZsWoiBDKBTNtvYngFWmvRDKVIPLOsd5DZ6KFtZe BtTW4wENLzUdPRwNnDTVtKIBH6BFFVWp6aHxYD9JKE9UxPV6xCp1Zg2HQzWIoidB zLS82cgAVs6GEYeLi931IkP7bjewy2HTv1KimX5o52mdR5lsJcfqjB7fBDwS4PO8 MGZMKonmQtRX6hnqAWdoNTlt5S/Jw4Hae2QSP+YjEmF7VuwFGF8c4G3Z+bSsSVJV 8+H3Doznrqc=N5Z0 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce