CVE-2017-6464
A vulnerability was discovered in the NTP server's parsing of configuration directives. A remote, authenticated attacker could cause ntpd to crash by sending a crafted message.
Find out more about CVE-2017-6464 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 5.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (ntp) | RHSA-2018:0855 | 2018-04-10 |
| Red Hat Enterprise Linux 6 (ntp) | RHSA-2017:3071 | 2017-10-26 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | ntp | Will not fix |
Acknowledgements
Red Hat would like to thank the NTP project for reporting this issue. Upstream acknowledges Cure53 as the original reporter.Mitigation
Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.