CVE-2016-7434 Denial of service in n/a
Remote attackers can crash the NTP server by sending a crafted mrulist query, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-7434?
CVE-2016-7434 is a high-severity denial of service vulnerability in Ntp Ntp, published on 13 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The read_mru_list function in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (crash) via a crafted mrulist query.
Weakness: CWE-20
Which versions are affected by CVE-2016-7434?
It affects 2 products.
Products include Hpe Hpux-Ntp, Ntp Ntp.
How do I fix CVE-2016-7434?
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-2016-7434 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-7434 exists.
Public exploit code: 1 Exploit-DB entry and 3 proofs of concept on GitHub.
Other vulnerabilities in Ntp Ntp
Sources
Also known as DEBIAN-CVE-2016-7434, GHSA-qf57-pg9f-mrmv, UBUNTU-CVE-2016-7434.