-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: dnsmasq security update Advisory ID: RHSA-2021:0156-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0156 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 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. 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 Server AUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server E4S (v. 7.4) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.4) - 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 Server AUS (v. 7.4): Source: dnsmasq-2.76-2.el7_4.3.src.rpm x86_64: dnsmasq-2.76-2.el7_4.3.x86_64.rpm dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.4): Source: dnsmasq-2.76-2.el7_4.3.src.rpm ppc64le: dnsmasq-2.76-2.el7_4.3.ppc64le.rpm dnsmasq-debuginfo-2.76-2.el7_4.3.ppc64le.rpm x86_64: dnsmasq-2.76-2.el7_4.3.x86_64.rpm dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.4): Source: dnsmasq-2.76-2.el7_4.3.src.rpm x86_64: dnsmasq-2.76-2.el7_4.3.x86_64.rpm dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.4): x86_64: dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm dnsmasq-utils-2.76-2.el7_4.3.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.4): ppc64le: dnsmasq-debuginfo-2.76-2.el7_4.3.ppc64le.rpm dnsmasq-utils-2.76-2.el7_4.3.ppc64le.rpm x86_64: dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm dnsmasq-utils-2.76-2.el7_4.3.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.4): x86_64: dnsmasq-debuginfo-2.76-2.el7_4.3.x86_64.rpm dnsmasq-utils-2.76-2.el7_4.3.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 iQIVAwUBYAbg5dzjgjWX9erEAQjfmA//U9huQUHWE5px5MpvL3/7ZlTnU3Q23tSz lOkHHhl4hwFmETAaVUv/Zoc1N7OfxHzC6C4ot2+rPFj+oMcZQeXUrfhKZkG5kWMn Qy/yIN9myOJ9jjM+2NmF+nQPAiIVi2fU/LkDIEYGXihDZB67/bvu2ErbX2dEOGaH ikX4JNYAVw8vnCZgRy2bbXq47Nff8oeys9sTcDWIq61Svg2mHYYtIoF4Xmz5N5u5 Gb+75FFSxlBoNQFbDyydm19UpGTGZ1dP5Giquvuv8hN0lXGDZN39TANk8FruwnB+ ibyRgzf1R3IwDKbMdkICVOtxfR6cMUXOk5fB6bygyL8Ki6o03N1/HPnQTOQ3XPDO Ya0eswXvMpG8DdhIPi6xlVhorxDj4QKaVKC82rnbb27KJP+UPC8KXfp8lEZSD0zX 56f2O2t42rjzrulnijDdeHtW6oI1MytA/hVLLM0Sdt6PYS19jflucnwP2UuZn0aR RRWjdK6Tx0OYxpPQBYVKygzm+0ke7Ee5BoGn+sYU5SZSH6ro0AlfIRVQn6XmTGUj Gotg6jc4a6HXjhrA72lkxvW9pzFVXpfiQ/VFhBblP39dcCXXyRfTSzgbutDAz7eu 5R8SwUBVIJ0e/Pp32WAMapLfKc+Pj9VG/INfwYYxtpWooy2cHk+3HZIy8gXylhCA lyNYjR6LrCc=sh0K -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce