CVE-2021-43105 — MEDIUM (4.3)

Q: How severe is CVE-2021-43105?

CVE-2021-43105 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-43105?

Check the references section above for vendor advisories and patch information. Affected products include: Technitium Dns Server.

Vulnerability 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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Technitium	Dns Server	<= 7.0

References

https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.mdRelease NotesThird Party Advisory
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.mdRelease NotesThird Party Advisory

FAQ

What is CVE-2021-43105?

CVE-2021-43105 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 cond...

How severe is CVE-2021-43105?

CVE-2021-43105 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-43105?

Check the references section above for vendor advisories and patch information. Affected products include: Technitium Dns Server.