HOMEVULNERABILITIESCVE-2018-10920
MEDIUM

CVE-2018-10920

CWE-20Published: August 2, 2018· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.

NVD Source

Technical Analysis

CVE-2018-10920 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 6.8.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

nic1 product(s)
knot resolver
Source: NVD CPE · 1 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-2018-10920
ADVISORYhttps://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.html
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920
ADVISORYhttps://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.html

All References (4)

→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920Issue Tracking · Third Party Advisory
→
https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.htmlVendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920Issue Tracking · Third Party Advisory
→
https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.htmlVendor Advisory

Quick Facts

CVE IDCVE-2018-10920
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedAug 2, 2018

Related CVEs (CWE-20)

CVE-2012-0838
10.0
CVE-2011-3092
10.0
CVE-2011-4249
10.0
CVE-2011-2397
10.0
CVE-2011-4727
10.0
CVE-2011-3095
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-10920 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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