It was found that an ntpd client could be forced to change from basic client/server mode to the interleaved symmetric mode. A remote attacker could use a spoofed packet that, when processed by an ntpd client, would cause that client to reject all future legitimate server responses, effectively disabling time synchronization on that client.
Find out more about CVE-2016-1548 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 6.4 |
|---|---|
| Base Metrics | AV:N/AC:L/Au:N/C:N/I:P/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | Partial |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (ntp) | RHSA-2016:1141 | 2016-05-31 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (ntp) | RHSA-2016:1552 | 2016-08-03 |
| Red Hat Enterprise Linux 7 (ntp) | RHSA-2016:1141 | 2016-05-31 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Not affected |
Vulmon