CVE-2020-25683 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2020-25683 Interim 1 63 2026-03-05T05:42:16Z current 2021-05-30T14:44:13Z 2026-03-05T05:42:16Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2020-25683 A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.suse.com/pipermail/sle-security-updates/2021-June/008902.html E-Mail link for SUSE-CU-2021:233-1 https://lists.suse.com/pipermail/sle-security-updates/2021-January/008225.html E-Mail link for SUSE-SU-2021:0162-1 https://lists.suse.com/pipermail/sle-security-updates/2021-January/008222.html E-Mail link for SUSE-SU-2021:0163-1 https://lists.suse.com/pipermail/sle-security-updates/2021-January/008223.html E-Mail link for SUSE-SU-2021:0166-1 https://lists.suse.com/pipermail/sle-security-updates/2021-January/008224.html E-Mail link for SUSE-SU-2021:14603-1 https://lists.suse.com/pipermail/sle-security-updates/2021-January/008226.html E-Mail link for SUSE-SU-2021:14604-1 https://www.suse.com/support/kb/doc/?id=000019824 E-Mail link for TID000019824 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/GY5KV2WHBZG4XCWVKZOU4DFCHSMBT5KV/ E-Mail link for openSUSE-SU-2021:0124-1 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/6B57K75B7OP43O3RNF2Q6TTLL4DZ6KPE/ E-Mail link for openSUSE-SU-2021:0129-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings Container suse/sles/15.2/virt-launcher:0.38.1.5.8.40 Container suse/sles/15.3/virt-launcher:0.45.0.8.14.1 HPE Helion OpenStack 8 SUSE Enterprise Storage 5 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Liberty Linux 8 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise High Performance Computing 15-ESPOS SUSE Linux Enterprise High Performance Computing 15-LTSS SUSE Linux Enterprise Micro 5.1 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Point of Sale 11 SP3 SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT SUSE Linux Enterprise Server 11 SP3-TERADATA SUSE Linux Enterprise Server 11 SP4-LTSS SUSE Linux Enterprise Server 12 SP2-BCL SUSE Linux Enterprise Server 12 SP2-ESPOS SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server 12 SP3-BCL SUSE Linux Enterprise Server 12 SP3-ESPOS SUSE Linux Enterprise Server 12 SP3-LTSS SUSE Linux Enterprise Server 12 SP3-TERADATA SUSE Linux Enterprise Server 12 SP4-ESPOS SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15-LTSS SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Micro 6.0 SUSE Linux Micro 6.1 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP1 SUSE Linux Enterprise Module for Basesystem 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP3 SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE OpenStack Cloud 7 SUSE OpenStack Cloud 8 SUSE OpenStack Cloud 9 SUSE OpenStack Cloud Crowbar 8 SUSE OpenStack Cloud Crowbar 9 openSUSE Leap 15.1 openSUSE Leap 15.2 openSUSE Leap 15.3 openSUSE Leap 15.4 openSUSE Tumbleweed dnsmasq-2.78-0.16.14.1 dnsmasq-2.78-0.17.15.1 dnsmasq-2.78-18.15.1 dnsmasq-2.78-3.11.1 dnsmasq-2.78-7.6.1 dnsmasq-2.78-7.8.1 dnsmasq-2.78-lp151.5.6.1 dnsmasq-2.78-lp152.7.3.1 dnsmasq-2.79-13.el8_3.1 dnsmasq-2.86-1.1 dnsmasq-2.86-150400.14.3 dnsmasq-2.86-7.17.1 dnsmasq-2.89-7.6 dnsmasq-2.90-150400.16.6.2 dnsmasq-2.90-160000.2.2 dnsmasq-2.90-slfo.1.1_1.2 dnsmasq-utils-2.78-18.15.1 dnsmasq-utils-2.78-lp151.5.6.1 dnsmasq-utils-2.78-lp152.7.3.1 dnsmasq-utils-2.79-13.el8_3.1 dnsmasq-utils-2.86-1.1 dnsmasq-utils-2.90-160000.2.2 dnsmasq-2.78-7.6.1 as a component of Container suse/sles/15.2/virt-launcher:0.38.1.5.8.40 dnsmasq-2.78-7.6.1 as a component of Container suse/sles/15.3/virt-launcher:0.45.0.8.14.1 dnsmasq-2.78-18.15.1 as a component of HPE Helion OpenStack 8 dnsmasq-utils-2.78-18.15.1 as a component of HPE Helion OpenStack 8 dnsmasq-2.78-18.15.1 as a component of SUSE Enterprise Storage 5 dnsmasq-2.79-13.el8_3.1 as a component of SUSE Liberty Linux 8 dnsmasq-utils-2.79-13.el8_3.1 as a component of SUSE Liberty Linux 8 dnsmasq-2.78-3.11.1 as a component of SUSE Linux Enterprise High Performance Computing 15-ESPOS dnsmasq-2.78-3.11.1 as a component of SUSE Linux Enterprise High Performance Computing 15-LTSS dnsmasq-2.78-7.8.1 as a component of SUSE Linux Enterprise Micro 5.1 dnsmasq-2.86-7.17.1 as a component of SUSE Linux Enterprise Micro 5.2 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Micro 5.3 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Micro 5.4 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Micro 5.5 dnsmasq-2.78-7.6.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP1 dnsmasq-2.78-7.6.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP2 dnsmasq-2.78-7.6.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP3 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP4 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP5 dnsmasq-2.86-150400.14.3 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 dnsmasq-2.90-150400.16.6.2 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP7 dnsmasq-2.78-0.16.14.1 as a component of SUSE Linux Enterprise Point of Sale 11 SP3 dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT dnsmasq-2.78-0.16.14.1 as a component of SUSE Linux Enterprise Server 11 SP3-TERADATA dnsmasq-2.78-0.17.15.1 as a component of SUSE Linux Enterprise Server 11 SP4-LTSS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP2-ESPOS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP3-BCL dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP3-ESPOS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP3-LTSS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP3-TERADATA dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP4-ESPOS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP4-LTSS dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server 12 SP5 dnsmasq-2.78-3.11.1 as a component of SUSE Linux Enterprise Server 15-LTSS dnsmasq-2.90-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 dnsmasq-utils-2.90-160000.2.2 as a component of SUSE Linux Enterprise Server 16.0 dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 dnsmasq-2.78-18.15.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP5 dnsmasq-2.78-3.11.1 as a component of SUSE Linux Enterprise Server for SAP Applications 15 dnsmasq-2.89-7.6 as a component of SUSE Linux Micro 6.0 dnsmasq-2.90-slfo.1.1_1.2 as a component of SUSE Linux Micro 6.1 dnsmasq-2.78-18.15.1 as a component of SUSE OpenStack Cloud 7 dnsmasq-utils-2.78-18.15.1 as a component of SUSE OpenStack Cloud 7 dnsmasq-2.78-18.15.1 as a component of SUSE OpenStack Cloud 8 dnsmasq-utils-2.78-18.15.1 as a component of SUSE OpenStack Cloud 8 dnsmasq-2.78-18.15.1 as a component of SUSE OpenStack Cloud 9 dnsmasq-utils-2.78-18.15.1 as a component of SUSE OpenStack Cloud 9 dnsmasq-2.78-18.15.1 as a component of SUSE OpenStack Cloud Crowbar 8 dnsmasq-utils-2.78-18.15.1 as a component of SUSE OpenStack Cloud Crowbar 8 dnsmasq-2.78-18.15.1 as a component of SUSE OpenStack Cloud Crowbar 9 dnsmasq-utils-2.78-18.15.1 as a component of SUSE OpenStack Cloud Crowbar 9 dnsmasq-2.78-lp151.5.6.1 as a component of openSUSE Leap 15.1 dnsmasq-utils-2.78-lp151.5.6.1 as a component of openSUSE Leap 15.1 dnsmasq-2.78-lp152.7.3.1 as a component of openSUSE Leap 15.2 dnsmasq-utils-2.78-lp152.7.3.1 as a component of openSUSE Leap 15.2 dnsmasq-2.78-7.8.1 as a component of openSUSE Leap 15.3 dnsmasq-2.86-150400.14.3 as a component of openSUSE Leap 15.4 dnsmasq-2.86-1.1 as a component of openSUSE Tumbleweed dnsmasq-utils-2.86-1.1 as a component of openSUSE Tumbleweed A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability. CVE-2020-25683 Container suse/sles/15.2/virt-launcher:0.38.1.5.8.40:dnsmasq-2.78-7.6.1 Container suse/sles/15.3/virt-launcher:0.45.0.8.14.1:dnsmasq-2.78-7.6.1 HPE Helion OpenStack 8:dnsmasq-2.78-18.15.1 HPE Helion OpenStack 8:dnsmasq-utils-2.78-18.15.1 SUSE Enterprise Storage 5:dnsmasq-2.78-18.15.1 SUSE Liberty Linux 8:dnsmasq-2.79-13.el8_3.1 SUSE Liberty Linux 8:dnsmasq-utils-2.79-13.el8_3.1 SUSE Linux Enterprise High Performance Computing 15-ESPOS:dnsmasq-2.78-3.11.1 SUSE Linux Enterprise High Performance Computing 15-LTSS:dnsmasq-2.78-3.11.1 SUSE Linux Enterprise Micro 5.1:dnsmasq-2.78-7.8.1 SUSE Linux Enterprise Micro 5.2:dnsmasq-2.86-7.17.1 SUSE Linux Enterprise Micro 5.3:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Micro 5.4:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Micro 5.5:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Module for Basesystem 15 SP1:dnsmasq-2.78-7.6.1 SUSE Linux Enterprise Module for Basesystem 15 SP2:dnsmasq-2.78-7.6.1 SUSE Linux Enterprise Module for Basesystem 15 SP3:dnsmasq-2.78-7.6.1 SUSE Linux Enterprise Module for Basesystem 15 SP4:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Module for Basesystem 15 SP5:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Module for Basesystem 15 SP6:dnsmasq-2.86-150400.14.3 SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsmasq-2.90-150400.16.6.2 SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP3:dnsmasq-utils-2.78-7.6.1 SUSE Linux Enterprise Point of Sale 11 SP3:dnsmasq-2.78-0.16.14.1 SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 11 SP3-TERADATA:dnsmasq-2.78-0.16.14.1 SUSE Linux Enterprise Server 11 SP4-LTSS:dnsmasq-2.78-0.17.15.1 SUSE Linux Enterprise Server 12 SP2-BCL:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP2-ESPOS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP2-LTSS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP3-BCL:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP3-ESPOS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP3-LTSS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP3-TERADATA:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP4-ESPOS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP4-LTSS:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 12 SP5:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server 15-LTSS:dnsmasq-2.78-3.11.1 SUSE Linux Enterprise Server 16.0:dnsmasq-2.90-160000.2.2 SUSE Linux Enterprise Server 16.0:dnsmasq-utils-2.90-160000.2.2 SUSE Linux Enterprise Server for SAP Applications 12 SP2:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server for SAP Applications 12 SP4:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server for SAP Applications 12 SP5:dnsmasq-2.78-18.15.1 SUSE Linux Enterprise Server for SAP Applications 15:dnsmasq-2.78-3.11.1 SUSE Linux Micro 6.0:dnsmasq-2.89-7.6 SUSE Linux Micro 6.1:dnsmasq-2.90-slfo.1.1_1.2 SUSE OpenStack Cloud 7:dnsmasq-2.78-18.15.1 SUSE OpenStack Cloud 7:dnsmasq-utils-2.78-18.15.1 SUSE OpenStack Cloud 8:dnsmasq-2.78-18.15.1 SUSE OpenStack Cloud 8:dnsmasq-utils-2.78-18.15.1 SUSE OpenStack Cloud 9:dnsmasq-2.78-18.15.1 SUSE OpenStack Cloud 9:dnsmasq-utils-2.78-18.15.1 SUSE OpenStack Cloud Crowbar 8:dnsmasq-2.78-18.15.1 SUSE OpenStack Cloud Crowbar 8:dnsmasq-utils-2.78-18.15.1 SUSE OpenStack Cloud Crowbar 9:dnsmasq-2.78-18.15.1 SUSE OpenStack Cloud Crowbar 9:dnsmasq-utils-2.78-18.15.1 openSUSE Leap 15.1:dnsmasq-2.78-lp151.5.6.1 openSUSE Leap 15.1:dnsmasq-utils-2.78-lp151.5.6.1 openSUSE Leap 15.2:dnsmasq-2.78-lp152.7.3.1 openSUSE Leap 15.2:dnsmasq-utils-2.78-lp152.7.3.1 openSUSE Leap 15.3:dnsmasq-2.78-7.8.1 openSUSE Leap 15.4:dnsmasq-2.86-150400.14.3 openSUSE Tumbleweed:dnsmasq-2.86-1.1 openSUSE Tumbleweed:dnsmasq-utils-2.86-1.1 important 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H