CVE-2016-1549 Business logic in NTP
An authenticated attacker can manipulate the NTP clock selection algorithm to modify a victim's system time.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-1549?
CVE-2016-1549 is a medium-severity vulnerability in Ntp Ntp, published on 6 Jan 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.
Weakness: CWE-19
Which versions are affected by CVE-2016-1549?
It affects 1 product.
Products include Ntp Ntp.
How do I fix CVE-2016-1549?
Upgrade to a fixed version.
Is CVE-2016-1549 being exploited?
There is no known exploitation of CVE-2016-1549 in the wild and no public exploit code.
Other vulnerabilities in Ntp Ntp
Sources
Also known as DEBIAN-CVE-2016-1549, GHSA-r89j-r995-h68w, UBUNTU-CVE-2016-1549.