Home/CVE/Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered b
CVE

CVE-2020-12662

Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered b

Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.

HIGH · CVSS 7.5 EPSS 0.16136
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

5
nlnetlabs unbound< 1.10.1
debian linuxall versions
opensuse leapall versions
canonical ubuntu linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 May 2020 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

14
suse-csafopenSUSE-SU-2024:11005-1
msrcCVE-2020-12662
suse-csafSUSE-SU-2020:1819-1
suse-csafopenSUSE-SU-2020:0912-1
suse-csafopenSUSE-SU-2020:0913-1
🔗

References & Sources

13
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlMailing ListThird Party Advisory
http://www.nxnsattack.comTechnical Description
http://www.openwall.com/lists/oss-security/2020/05/19/5Mailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
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