CVE-2016-4955 Race condition in n/a
Remote attackers can cause denial of service in NTP daemon by sending spoofed packets when autokey is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4955?
CVE-2016-4955 is a medium-severity vulnerability in Ntp Ntp, published on 5 Jul 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Weakness: CWE-362
Which versions are affected by CVE-2016-4955?
It affects 10 products.
Products include Novell Suse Manager, Ntp Ntp, Opensuse Leap, Opensuse Opensuse, Oracle Solaris, Siemens Simatic Net Cp 443-1 Opc Ua Firmware and 4 more.
How do I fix CVE-2016-4955?
Upgrade to a fixed version.
Is CVE-2016-4955 being exploited?
There is no known exploitation of CVE-2016-4955 in the wild and no public exploit code.
Other vulnerabilities in Ntp Ntp
Sources
Also known as DEBIAN-CVE-2016-4955, GHSA-c9r5-4837-463p, UBUNTU-CVE-2016-4955.