Unrated severityNVD Advisory· Published Jan 20, 2021· Updated Nov 4, 2025
CVE-2020-25681
CVE-2020-25681
Description
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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Affected products
30- dnsmasq/dnsmasqdescription
- Range: <2.83
- osv-coords28 versionspkg:rpm/opensuse/dnsmasq&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/dnsmasq&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/dnsmasq&distro=openSUSE%20Tumbleweedpkg:rpm/suse/dnsmasq&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/dnsmasq&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/dnsmasq&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/dnsmasq&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/dnsmasq&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/dnsmasq&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/dnsmasq&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/dnsmasq&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 2.78-lp151.5.6.1+ 27 more
- (no CPE)range: < 2.78-lp151.5.6.1
- (no CPE)range: < 2.78-lp152.7.3.1
- (no CPE)range: < 2.86-1.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-3.11.1
- (no CPE)range: < 2.78-3.11.1
- (no CPE)range: < 2.78-7.6.1
- (no CPE)range: < 2.78-7.6.1
- (no CPE)range: < 2.78-0.16.14.1
- (no CPE)range: < 2.78-0.17.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-3.11.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-3.11.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
- (no CPE)range: < 2.78-18.15.1
Patches
Vulnerability mechanics
References
7- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/mitrevendor-advisoryx_refsource_FEDORA
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/mitrevendor-advisoryx_refsource_FEDORA
- security.gentoo.org/glsa/202101-17mitrevendor-advisoryx_refsource_GENTOO
- www.debian.org/security/2021/dsa-4844mitrevendor-advisoryx_refsource_DEBIAN
- bugzilla.redhat.com/show_bug.cgimitrex_refsource_MISC
- lists.debian.org/debian-lts-announce/2021/03/msg00027.htmlmitremailing-listx_refsource_MLIST
- www.jsof-tech.com/disclosures/dnspooq/mitrex_refsource_MISC
News mentions
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