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CVE-2020-13817

Date: June 4, 2020

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.

Severity Score

Related Resources (12)

https://www.oracle.com/security-alerts/cpujan2022.html
https://security-tracker.debian.org/tracker/CVE-2020-13817
https://security.netapp.com/advisory/ntap-20200625-0004/
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html
http://support.ntp.org/bin/view/Main/NtpBug3596
https://bugs.ntp.org/show_bug.cgi?id=3596
https://nvd.nist.gov/vuln/detail/CVE-2020-13817
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html
https://access.redhat.com/security/cve/CVE-2020-13817
https://security.gentoo.org/glsa/202007-12
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-13817
https://www.mend.io/vulnerability-database/CVE-2020-13817

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Use of Insufficiently Random Values

CWE-330

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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