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CVE-2020-11868

Date: April 16, 2020

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.

Severity Score

Related Resources (13)

https://bugzilla.redhat.com/show_bug.cgi?id=1716665
https://security.netapp.com/advisory/ntap-20200424-0002/
https://nvd.nist.gov/vuln/detail/CVE-2020-11868
http://support.ntp.org/bin/view/Main/NtpBug3592
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00004.html
https://security-tracker.debian.org/tracker/CVE-2020-11868
https://www.oracle.com//security-alerts/cpujul2021.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-11868
https://access.redhat.com/security/cve/CVE-2020-11868
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html
https://security.gentoo.org/glsa/202007-12
https://www.mend.io/vulnerability-database/CVE-2020-11868

Severity Score

Weakness Type (CWE)

Origin Validation Error

CWE-346

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

CVSS v3.1

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

CVSS v2

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

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