CVE-2016-5117 Security feature bypass in n/a
OpenNTPD fails to validate certificate common names, allowing attackers to bypass man-in-the-middle protections for timestamp constraints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-5117?
CVE-2016-5117 is a medium-severity vulnerability in n/a, published on 31 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenNTPD before 6.0p1 does not validate the CN for HTTPS constraint requests, which allows remote attackers to bypass the man-in-the-middle mitigations via a crafted timestamp constraint with a valid certificate.
Weakness: CWE-254
Which versions are affected by CVE-2016-5117?
It affects 1 product.
Products include Openntpd Openntpd.
How do I fix CVE-2016-5117?
Upgrade to a fixed version.
Is CVE-2016-5117 being exploited?
There is no known exploitation of CVE-2016-5117 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2016-5117, GHSA-4m25-49gx-cpq6.