HOMEVULNERABILITIESCVE-2019-10190
HIGH

CVE-2019-10190

CWE-20Published: July 16, 2019· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.

NVD Source

Technical Analysis

CVE-2019-10190 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

Fedora1 product(s)
fedora
nic1 product(s)
knot resolver
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190
ADVISORYhttps://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190
ADVISORYhttps://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html

All References (10)

→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/
→
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.htmlRelease Notes · Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/
→
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.htmlRelease Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2019-10190
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected2 vendor(s)
PublishedJul 16, 2019

Related CVEs (CWE-20)

CVE-2020-13753
10.0
CVE-2026-34910
KEV10.0
CVE-2020-12388
10.0
CVE-2020-12389
10.0
CVE-2021-21321
10.0
CVE-2021-23279
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-10190 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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