CVE-2019-19794

Name: CVE-2019-19794
Creator: NVD / NIST
Published: 2019-12-13T22:15:11.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 2.07%

Last modified Jun 17, 2026

CVE-2019-19794 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.. EPSS estimates a 2.07% chance of exploitation in the next 30 days.

Description

The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

2.07%

79.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-338

Affected Software

Vendor	Product	Versions
Miekg-Dns Project	Miekg-Dns	< 1.1.25

References

https://github.com/coredns/coredns/issues/3519Issue Tracking, Third Party Advisory
https://github.com/coredns/coredns/issues/3547Third Party Advisory
https://github.com/miekg/dns/compare/v1.1.24...v1.1.25Release Notes, Third Party Advisory
https://github.com/miekg/dns/issues/1043Exploit, Issue Tracking, Third Party Advisory
https://github.com/miekg/dns/pull/1044Patch, Third Party Advisory
https://github.com/coredns/coredns/issues/3519Issue Tracking, Third Party Advisory
https://github.com/coredns/coredns/issues/3547Third Party Advisory
https://github.com/miekg/dns/compare/v1.1.24...v1.1.25Release Notes, Third Party Advisory
https://github.com/miekg/dns/issues/1043Exploit, Issue Tracking, Third Party Advisory
https://github.com/miekg/dns/pull/1044Patch, Third Party Advisory

Timeline

Published: Dec 13, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19794?

How severe is CVE-2019-19794?

CVE-2019-19794 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 2.07% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19794?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19794?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST