CVE-2023-28451: dnsserver DoS (CVSS 7.5)

Description

An issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing DoS (denial of service) for normal resolution. The effects of an exploit would be widespread and highly impactful, because the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
technitium	dnsserver	All

References

Other References

https://gist.github.com/idealeer/89947ca07836fd0f7e9761198ca9a0f3. https://technitium.com/dns/

Frequently Asked Questions

What is CVE-2023-28451? +

An issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing DoS (denial of service) for normal resolution. The effects of an exploit would be widespread and highly impactful, because the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-28451? +

CVE-2023-28451 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-28451? +

CVE-2023-28451 affects products from technitium, specifically: dnsserver. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-28451? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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