HOME VULNERABILITIESCVE-2020-13817

HIGH

CVE-2020-13817

CWE-330Published: June 4, 2020· Updated: Jun 17, 2026

7.4

CVSS v3.1

Official Description

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

Technical Analysis

CVE-2020-13817 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), availability disruption (denial of service), with a CVSS base score of 7.4.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

fujitsu12 product(s)

m10-1 firmwarem10-1m10-4 firmwarem10-4m10-4s firmwarem10-4sm12-1 firmwarem12-1m12-2 firmwarem12-2m12-2s firmwarem12-2s

netapp26 product(s)

cloud backupclustered data ontapdata ontapelement softwarehci management nodeontap toolssolidfiresteelstore cloud integrated storagehci compute node firmwarehci compute nodeh410c firmwareh410c+14

ntp1 product(s)

ntp

openSUSE1 product(s)

leap

Source: NVD CPE · 42 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html

PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html

ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3596

ADVISORYhttps://bugs.ntp.org/show_bug.cgi?id=3596

ADVISORYhttps://security.gentoo.org/glsa/202007-12

ADVISORYhttps://security.netapp.com/advisory/ntap-20200625-0004/

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html

ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug3596

ADVISORYhttps://bugs.ntp.org/show_bug.cgi?id=3596

ADVISORYhttps://security.gentoo.org/glsa/202007-12

ADVISORYhttps://security.netapp.com/advisory/ntap-20200625-0004/

All References (14)

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlMailing List · Third Party Advisory

→

http://support.ntp.org/bin/view/Main/NtpBug3596Vendor Advisory

→

https://bugs.ntp.org/show_bug.cgi?id=3596Issue Tracking · Vendor Advisory

→

https://security.gentoo.org/glsa/202007-12Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20200625-0004/Third Party Advisory

→

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlMailing List · Third Party Advisory

→

http://support.ntp.org/bin/view/Main/NtpBug3596Vendor Advisory

→

https://bugs.ntp.org/show_bug.cgi?id=3596Issue Tracking · Vendor Advisory

→

https://security.gentoo.org/glsa/202007-12Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20200625-0004/Third Party Advisory

→

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-13817

CVSS Score7.4 / 10

SeverityHIGH

WeaknessCWE-330

CISA KEVNo

Affected4 vendor(s)

PublishedJun 4, 2020

Related CVEs (CWE-330)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2020-13817 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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