Denial of Service in dnsmasq
ID: | RHSA-2020:3878-01 |
Distribution: | Red Hat |
Plattformen: | Red Hat Enterprise Linux |
Datum: | Di, 29. September 2020, 23:12 |
Referenzen: | https://access.redhat.com/security/cve/CVE-2019-14834 |
Applikationen: | Dnsmasq |
Originalnachricht |
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Low: dnsmasq security and bug fix update Advisory ID: RHSA-2020:3878-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:3878 Issue date: 2020-09-29 CVE Names: CVE-2019-14834 ===================================================================== 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 Low. 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: memory leak in the create_helper() function in /src/helper.c (CVE-2019-14834) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from 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/): 1752569 - [RHEL-7] Change dhcp_release to use default address when no IP subnet matches 1755610 - dnsmasq not returning REFUSED to DNS queries without the recursion bit set 1757247 - DHCPv6 relay-fwd requests are ignored by dnsmasq 1764425 - CVE-2019-14834 dnsmasq: memory leak in the create_helper() function in /src/helper.c 1815080 - Stop treating SERVFAIL as a successful response from upstream servers 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: dnsmasq-2.76-16.el7.src.rpm x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: dnsmasq-2.76-16.el7.src.rpm x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: dnsmasq-2.76-16.el7.src.rpm ppc64: dnsmasq-2.76-16.el7.ppc64.rpm dnsmasq-debuginfo-2.76-16.el7.ppc64.rpm ppc64le: dnsmasq-2.76-16.el7.ppc64le.rpm dnsmasq-debuginfo-2.76-16.el7.ppc64le.rpm s390x: dnsmasq-2.76-16.el7.s390x.rpm dnsmasq-debuginfo-2.76-16.el7.s390x.rpm x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: dnsmasq-debuginfo-2.76-16.el7.ppc64.rpm dnsmasq-utils-2.76-16.el7.ppc64.rpm ppc64le: dnsmasq-debuginfo-2.76-16.el7.ppc64le.rpm dnsmasq-utils-2.76-16.el7.ppc64le.rpm s390x: dnsmasq-debuginfo-2.76-16.el7.s390x.rpm dnsmasq-utils-2.76-16.el7.s390x.rpm x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: dnsmasq-2.76-16.el7.src.rpm x86_64: dnsmasq-2.76-16.el7.x86_64.rpm dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: dnsmasq-debuginfo-2.76-16.el7.x86_64.rpm dnsmasq-utils-2.76-16.el7.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-2019-14834 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index 8. Contact: The Red Hat security contact is |