Upstream information

CVE-2020-25687 at MITRE

Description

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. This flaw allows a remote attacker, who can create valid DNS replies, 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 sort_rrset() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.1
Vector AV:N/AC:M/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 5.9 5.9
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Access Vector Network Network
Access Complexity High High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1177077 [IN_PROGRESS]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
HPE Helion Openstack 8
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
HPE-Helion-OpenStack-8-2021-166
SUSE Enterprise Storage 5
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-Storage-5-2021-166
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • dnsmasq >= 2.78-3.11.1
Patchnames:
SUSE-SLE-Product-HPC-15-2021-162
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • dnsmasq >= 2.78-7.6.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2021-163
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • dnsmasq >= 2.78-7.6.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2021-163
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
  • dnsmasq-utils >= 2.78-7.6.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2021-163
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2
  • dnsmasq-utils >= 2.78-7.6.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2021-163
SUSE Linux Enterprise Point of Sale 11 SP3
  • dnsmasq >= 2.78-0.16.14.1
Patchnames:
sleposp3-dnsmasq-14604
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-POS-12-SP2-CLIENT-2021-166
SUSE Linux Enterprise Server 11 SP4-LTSS
  • dnsmasq >= 2.78-0.17.15.1
Patchnames:
slessp4-dnsmasq-14603
SUSE Linux Enterprise Server 12 SP2-BCL
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-BCL-2021-166
SUSE Linux Enterprise Server 12 SP2-ESPOS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-ESPOS-2021-166
SUSE Linux Enterprise Server 12 SP2-LTSS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-2021-166
SUSE Linux Enterprise Server 12 SP3-BCL
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-BCL-2021-166
SUSE Linux Enterprise Server 12 SP3-ESPOS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-ESPOS-2021-166
SUSE Linux Enterprise Server 12 SP3-LTSS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-2021-166
SUSE Linux Enterprise Server 12 SP4-ESPOS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-ESPOS-2021-166
SUSE Linux Enterprise Server 12 SP4-LTSS
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-LTSS-2021-166
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SERVER-12-SP5-2021-166
SUSE Linux Enterprise Server 15-LTSS
  • dnsmasq >= 2.78-3.11.1
Patchnames:
SUSE-SLE-Product-SLES-15-2021-162
SUSE Linux Enterprise Server for SAP Applications 12 SP2
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SAP-12-SP2-2021-166
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SAP-12-SP3-2021-166
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • dnsmasq >= 2.78-18.15.1
Patchnames:
SUSE-SLE-SAP-12-SP4-2021-166
SUSE Linux Enterprise Server for SAP Applications 15
  • dnsmasq >= 2.78-3.11.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2021-162
SUSE OpenStack Cloud 7
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
SUSE-OpenStack-Cloud-7-2021-166
SUSE OpenStack Cloud 8
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
SUSE-OpenStack-Cloud-8-2021-166
SUSE OpenStack Cloud 9
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
SUSE-OpenStack-Cloud-9-2021-166
SUSE OpenStack Cloud Crowbar 8
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-8-2021-166
SUSE OpenStack Cloud Crowbar 9
  • dnsmasq >= 2.78-18.15.1
  • dnsmasq-utils >= 2.78-18.15.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-9-2021-166
openSUSE Leap 15.1
  • dnsmasq >= 2.78-lp151.5.6.1
  • dnsmasq-debuginfo >= 2.78-lp151.5.6.1
  • dnsmasq-debugsource >= 2.78-lp151.5.6.1
  • dnsmasq-utils >= 2.78-lp151.5.6.1
  • dnsmasq-utils-debuginfo >= 2.78-lp151.5.6.1
Patchnames:
openSUSE-2021-129
openSUSE Leap 15.2
  • dnsmasq >= 2.78-lp152.7.3.1
  • dnsmasq-debuginfo >= 2.78-lp152.7.3.1
  • dnsmasq-debugsource >= 2.78-lp152.7.3.1
  • dnsmasq-utils >= 2.78-lp152.7.3.1
  • dnsmasq-utils-debuginfo >= 2.78-lp152.7.3.1
Patchnames:
openSUSE-2021-124


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
HPE Helion OpenStack 8 dnsmasq Released
SUSE CaaS Platform 4.0 dnsmasq Released
SUSE Enterprise Storage 5 dnsmasq Released
SUSE Enterprise Storage 6 dnsmasq Released
SUSE Linux Enterprise High Performance Computing 12 SP5 dnsmasq Released
SUSE Linux Enterprise High Performance Computing 15 LTSS dnsmasq Released
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS dnsmasq Released
SUSE Linux Enterprise Module for Basesystem 15 SP1 dnsmasq Released
SUSE Linux Enterprise Module for Basesystem 15 SP2 dnsmasq Released
SUSE Linux Enterprise Point of Service 11 SP3 dnsmasq Released
SUSE Linux Enterprise Point of Service Image Server 12 dnsmasq Released
SUSE Linux Enterprise Server 11 SP4 LTSS dnsmasq Released
SUSE Linux Enterprise Server 12 SP2 BCL dnsmasq Released
SUSE Linux Enterprise Server 12 SP2 ESPOS dnsmasq Released
SUSE Linux Enterprise Server 12 SP2 LTSS dnsmasq Released
SUSE Linux Enterprise Server 12 SP3 BCL dnsmasq Released
SUSE Linux Enterprise Server 12 SP3 ESPOS dnsmasq Released
SUSE Linux Enterprise Server 12 SP3 LTSS dnsmasq Released
SUSE Linux Enterprise Server 12 SP4 ESPOS dnsmasq Released
SUSE Linux Enterprise Server 12 SP4 LTSS dnsmasq Released
SUSE Linux Enterprise Server 12 SP5 dnsmasq Released
SUSE Linux Enterprise Server 15 LTSS dnsmasq Released
SUSE Linux Enterprise Server 15 SP1 Business Critical Linux dnsmasq Released
SUSE Linux Enterprise Server 15 SP1 LTSS dnsmasq Released
SUSE Linux Enterprise Server ESPOS 15 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 12 SP2 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 12 SP3 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 15 dnsmasq Released
SUSE Linux Enterprise Server for SAP Applications 15 SP1 dnsmasq Released
SUSE Manager Proxy 4.0 dnsmasq Released
SUSE Manager Retail Branch Server 4.0 dnsmasq Released
SUSE Manager Server 4.0 dnsmasq Released
SUSE OpenStack Cloud 6 LTSS dnsmasq Unsupported
SUSE OpenStack Cloud 7 dnsmasq Released
SUSE OpenStack Cloud 8 dnsmasq Released
SUSE OpenStack Cloud 9 dnsmasq Released
SUSE OpenStack Cloud Crowbar 8 dnsmasq Released
SUSE OpenStack Cloud Crowbar 9 dnsmasq Released