Home/CVE/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 o
CVE

CVE-2020-13817

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 o

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.

HIGH · CVSS 7.4 EPSS 0.00348
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-330Use of Insufficiently Random Values
CWE-330Use of Insufficiently Random Values
▤

Affected Products & Versions

32
ntp< 4.2.8
ntp>= 4.3.0 and < 4.3.100
ntpall versions
netapp cloud backupall versions
netapp clustered data ontapall versions
netapp data ontapall versions
netapp element softwareall versions
netapp hci management nodeall versions
▣

Scoring & Timeline

7.4
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Jun 2020 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:11102-1
suse-csafopenSUSE-SU-2020:1007-1
suse-csafopenSUSE-SU-2020:0934-1
suse-csafSUSE-SU-2020:1823-1
suse-csafSUSE-SU-2020:14415-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlMailing ListThird Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug3596Vendor Advisory
https://bugs.ntp.org/show_bug.cgi?id=3596Issue TrackingVendor Advisory
https://security.gentoo.org/glsa/202007-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20200625-0004/Third Party Advisory
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