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CVE-2019-19794

20
FAUCET Score

CVE-2019-19794 describes a vulnerability in the miekg Go DNS package (before 1.1.25), affecting products like CoreDNS (before 1.6.6). It stems from the improper use of math/rand for random number generation, making DNS transaction IDs predictable and enabling response forgeries. Rated Medium (CVSS 5.9), this vulnerability has a network attack vector and high impact on integrity, but requires high attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.25CPE matchmatch criteria
cpe:2.3:a:miekg-dns_project:miekg-dns:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.07%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0207 is in the 65th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/miekg/dnsFixed in: 1.1.25
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Jaeger 1.20Fixed in: distributed-tracing/jaeger-rhel8-operator:1.20.1-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: rhosp-rhel8-tech-preview/osp-director-operator:1.2.3-2
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: osp-director-provisioner-container
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: rhosp-rhel8/osp-director-downloader

Vendor Advisories (2)

goGHSA-44r7-7p62-q3frmedium

miekg/dns insecurely generates random numbers

May 18, 2021
redhatCVE-2019-19794Moderate

golang-github-miekg-dns: predictable TXID can lead to response forgeries

Dec 5, 2019

References

github.com / coredns/coredns/issues/3519
Issue TrackingThird Party Advisory
github.com / coredns/coredns/issues/3547
Third Party Advisory
github.com / miekg/dns/compare/v1.1.24...v1.1.25
Release NotesThird Party Advisory
github.com / miekg/dns/issues/1043
ExploitIssue TrackingThird Party Advisory
github.com / miekg/dns/pull/1044
PatchThird Party Advisory