Home/CVE/In BIND 9.14.0 - 9.16.5, 9.17.0 - 9.17.3, If a server is configured with both QNAME minimization and 'forward first' the
CVE

CVE-2020-8621

In BIND 9.14.0 - 9.16.5, 9.17.0 - 9.17.3, If a server is configured with both QNAME minimization and 'forward first' the

In BIND 9.14.0 - 9.16.5, 9.17.0 - 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.

HIGH · CVSS 7.5 EPSS 0.04879
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-617Reachable Assertion
▤

Affected Products & Versions

6
isc bind>= 9.14.0 and <= 9.16.5
isc bind>= 9.17.0 and <= 9.17.3
opensuse leapall versions
canonical ubuntu linuxall versions
synology dns server< 2.2.2-5027
netapp steelstore cloud integrated storageall versions
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighDNS Server Error Failed Loading the ServerLevelPluginDLL
productlowDNS Server Discovery Via LDAP Query
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-officer@isc.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 NVD21 Aug 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:10650-1
suse-csafopenSUSE-SU-2020:1701-1
suse-csafopenSUSE-SU-2020:1699-1
suse-csafSUSE-SU-2020:2914-1
msrcCVE-2020-8621
🔗

References & Sources

7
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/2020-10/msg00041.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlMailing ListThird Party Advisory
https://kb.isc.org/docs/cve-2020-8621Vendor Advisory
https://security.gentoo.org/glsa/202008-19Third Party Advisory
https://security.netapp.com/advisory/ntap-20200827-0003/Third Party Advisory
https://usn.ubuntu.com/4468-1/Third Party Advisory
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