CVE-2019-1967
Last modified
CVE-2019-1967 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the Network Time Protocol (NTP) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to excessive use of system resources when the affected device is logging a drop action for received MODE_PRIVATE (Mode 7) NTP packets. EPSS estimates a 1.97% chance of exploitation in the next 30 days.
Description
A vulnerability in the Network Time Protocol (NTP) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to excessive use of system resources when the affected device is logging a drop action for received MODE_PRIVATE (Mode 7) NTP packets. An attacker could exploit this vulnerability by flooding the device with a steady stream of Mode 7 NTP packets. A successful exploit could allow the attacker to cause high CPU and memory usage on the affected device, which could cause internal system processes to restart or cause the affected device to unexpectedly reload. Note: The NTP feature is enabled by default.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | 6.2 |
| Cisco | Nx-Os | 7.3 |
| Cisco | Nx-Os | 8.1 |
| Cisco | Nx-Os | 8.2 |
| Cisco | Nx-Os | 8.3 |
| Cisco | Nx-Os | 6.0\(2\)a8\(9.7\) |
| Cisco | Nx-Os | 6.0\(2\)u6 |
| Cisco | Nx-Os | 7.0\(3\)i |
| Cisco | Nx-Os | 9.2 |
| Cisco | Nx-Os | 9.2\(1\) |
| Cisco | Nx-Os | 6.0\(2\)a8 |
| Cisco | Nx-Os | 7.0\(3\)i7 |
| Cisco | Nx-Os | 7.0\(3\)f |
| Cisco | Nx-Os | 7.1\(4\) |
| Cisco | Nx-Os | 7.1\(4\)n1\(1\) |
| Cisco | Nx-Os | 7.1\(5\) |
| Cisco | Nx-Os | 7.2 |
| Cisco | Nx-Os | 7.3\(2\)d1\(1\) |
| Cisco | Nx-Os | 8.0 |
| Cisco | Nx-Os | 8.3\(2\)s5 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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