CVE-2020-13817 Denial of service in n/a
Remote attackers can cause NTP daemon exit or system time changes by spoofing packets if unauthenticated IPv4 sources are used.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-13817?
CVE-2020-13817 is a medium-severity denial of service vulnerability in Netapp Cloud Backup, published on 4 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-330
Which versions are affected by CVE-2020-13817?
It affects 25 products.
Products include Fujitsu M10-1 Firmware, Fujitsu M10-4 Firmware, Fujitsu M10-4s Firmware, Fujitsu M12-1 Firmware, Fujitsu M12-2 Firmware, Fujitsu M12-2s Firmware and 19 more.
How do I fix CVE-2020-13817?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-13817 being exploited?
There is no known exploitation of CVE-2020-13817 in the wild and no public exploit code.
Sources
Also known as CLSA-2024-1735122554, CLSA-2024-1735128099, CVE-2020-13816, DEBIAN-CVE-2020-13817, GHSA-fx6x-7xgx-2wwp, UBUNTU-CVE-2020-13817.