Vulnerability 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.
CVSS Score
5.9
MEDIUM
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openntpd | Openntpd | <= 6.0 |
Related Weaknesses (CWE)
References
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=Patch
- http://www.openntpd.org/txt/release-6.0p1.txtVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/23/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/29/6Mailing ListThird Party Advisory
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=Patch
- http://www.openntpd.org/txt/release-6.0p1.txtVendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/23/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/05/29/6Mailing ListThird Party Advisory
FAQ
What is CVE-2016-5117?
CVE-2016-5117 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 ...
How severe is CVE-2016-5117?
CVE-2016-5117 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-5117?
Check the references section above for vendor advisories and patch information. Affected products include: Openntpd Openntpd.