CVE-2016-4957
The MITRE CVE dictionary describes this issue as:
ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.
Find out more about CVE-2016-4957 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue did not affect the versions of ntp as shipped with any Red Hat Enterprise Linux version as they did not include the same upstream fix for CVE-2016-1547 that introduced the issue. The fix developed by Red Hat for CVE-2016-1547 did not include this issue.
CVSS v2 metrics
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 5 |
|---|---|
| Base Metrics | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | ntp | Not affected |
| Red Hat Enterprise Linux 6 | ntp | Not affected |
| Red Hat Enterprise Linux 5 | ntp | Not affected |
Acknowledgements
Red Hat would like to thank CERT/CC for reporting this issue. Upstream acknowledges Nicolas Edet (Cisco) as the original reporter.External References
CVE description copyright © 2017, The MITRE Corporation