Home/CVE/A vulnerability in the bailiwick checking function in Technitium DNS Server <= v7.0 exists that allows specific maliciou
CVE

CVE-2021-43105

A vulnerability in the bailiwick checking function in Technitium DNS Server <= v7.0 exists that allows specific maliciou

A vulnerability in the bailiwick checking function in Technitium DNS Server <= v7.0 exists that allows specific malicious users to inject NS records of any domain (even TLDs) into the cache and conduct a DNS cache poisoning attack.

MEDIUM · CVSS 4.3 EPSS 0.00093
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules2 YARA rules0
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Affected Products & Versions

1
technitium dns server<= 7.0
◈

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

4.3
MEDIUM · 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 NVD28 Mar 2022 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.mdRelease NotesThird Party Advisory
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