CVE-2021-43105
Last modified
CVE-2021-43105 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.60% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Technitium | Dns Server | <= 7.0 |
References
- https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.mdRelease Notes, Third Party Advisory
- https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.mdRelease Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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