ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the "received" timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-7184 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 3.1 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L |
Attack Vector | Network |
Attack Complexity | High |
Privileges Required | Low |
User Interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | Low |
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 |