It was discovered that ntpd as a client did not correctly check timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with the server.
Find out more about CVE-2015-7704 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.4, as they do not include support for KoD packets.
| 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-2015:1930 | 2015-10-26 |
| Red Hat Enterprise Linux Extended Update Support 6.6 (ntp) | RHSA-2015:2520 | 2015-11-26 |
| Red Hat Enterprise Linux 7 (ntp) | RHSA-2015:1930 | 2015-10-26 |
| Red Hat Enterprise Linux Extended Update Support 6.5 (ntp) | RHSA-2015:2520 | 2015-11-26 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Not affected |
Vulmon