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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openntpd | Openntpd | * | 6.0 (including) |
| Openntpd | Ubuntu | artful | * |
| Openntpd | Ubuntu | precise | * |
| Openntpd | Ubuntu | wily | * |
| Openntpd | Ubuntu | yakkety | * |
| Openntpd | Ubuntu | zesty | * |