Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-7871 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, 6, and 7.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| 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 | 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 |
Vulmon