CVE-2022-30257

An issue was discovered in Technitium DNS Server through 8.0.2 that allows variant V1 of unintended domain name resolution

Critical · published November 21, 2022

CVSS v3.1
9.8
EPSS
1%
Percentile
53.4
In the wild
Unconfirmed
What it is

🚨 A revoked domain name can still respond, like a ghost that won't leave the party! 😱 Think of it like a restaurant that’s permanently closed but still answers the phone, taking orders based on old menus. Just as customers are misled, users querying these domains can be led into dangerous waters. An attacker could exploit this flaw to redirect users to malicious sites by resurrecting domains that should be off-limits. This opens the door to phishing attacks, malware distribution, and other nefarious actions that could compromise sensitive data on a massive scale. The fallout from this could be absolutely devastating!

Put simply

Think of it like a restaurant that’s permanently closed but still answers the phone, taking orders based on old menus. Just as customers are misled, users querying these domains can be led into dangerous waters. CVE-2022-30257 affects Technitium DNS Server versions up to 8.0.2, allowing unintended domain name resolutions for revoked domains. This happens because the server fails to properly handle expired or maliciously revoked domains, letting them remain resolvable.

What to do

An attacker could exploit this flaw to redirect users to malicious sites by resurrecting domains that should be off-limits. This opens the door to phishing attacks, malware distribution, and other nefarious actions that could compromise sensitive data on a massive scale. The fallout from this could be absolutely devastating! Update the Technitium DNS Server to the latest version available to mitigate this issue. Additionally, implement stricter domain validation policies to ensure revoked domains do not resolve. Regularly audit DNS configurations to identify and address potential weaknesses. You've got this! With these steps, you'll kick those ghost domains out for good! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00722 · 53.4th percentile
Published
2022-11-21T00:00Z
EPSS history
Timeline
  • 21 NOV 00:00Z
    An issue was discovered in Technitium DNS Server through 8.0.2 that allows variant V1 of unintended domain name resolution
    cvelistv5