HIGH
CVE-2020-11868
CWE-346Published: April 17, 2020· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official 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.
Technical Analysis
CVE-2020-11868 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 availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Debian1 product(s)
debian linux
netapp20 product(s)
data ontaphci management nodesolidfirevasa provider for clustered data ontapvirtual storage consoleclustered data ontaphci storage node firmwarehci storage nodefabric-attached storage 8300 firmwarefabric-attached storage 8300fabric-attached storage 8700 firmwarefabric-attached storage 8700+8
ntp1 product(s)
ntp
openSUSE1 product(s)
leap
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 26 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (16)
→
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
Quick Facts
CVE IDCVE-2020-11868
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-346
CISA KEVNo
Affected5 vendor(s)
PublishedApr 17, 2020
Related CVEs (CWE-346)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-11868 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.