CVE-2020-11868
HIGHCVSS 7.5/10EPSS 2.08%
Last modified
CVE-2020-11868 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.08% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ntp | Ntp | <= 4.2.7 |
| Ntp | Ntp | >= 4.3.98, < 4.3.100 |
| Ntp | Ntp | 4.2.8 |
| Redhat | Enterprise Linux | 7.0 |
| Netapp | Data Ontap | All versions |
| Netapp | Hci Management Node | All versions |
| Netapp | Solidfire | All versions |
| Netapp | Vasa Provider For Clustered Data Ontap | >= 7.2 |
| Netapp | Virtual Storage Console | >= 7.2 |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Hci Storage Node Firmware | All versions |
| Netapp | Fabric-Attached Storage 8300 Firmware | All versions |
| Netapp | Fabric-Attached Storage 8700 Firmware | All versions |
| Netapp | Fabric-Attached Storage A400 Firmware | All versions |
| Netapp | All Flash Fabric-Attached Storage 8300 Firmware | All versions |
| Netapp | All Flash Fabric-Attached Storage 8700 Firmware | All versions |
| Netapp | All Flash Fabric-Attached Storage A400 Firmware | All versions |
| Debian | Debian Linux | 8.0 |
| Opensuse | Leap | 15.1 |
| Opensuse | Leap | 15.2 |
References
- 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/NtpBug3592Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1716665Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00004.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202007-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200424-0002/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.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/NtpBug3592Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1716665Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00004.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202007-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200424-0002/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-11868?
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.
How severe is CVE-2020-11868?
CVE-2020-11868 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.08% probability of exploitation in the next 30 days.
How do I fix CVE-2020-11868?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-11868?
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Scan your code nowSource: NVD / NIST