# CVE-2018-7184: ntp: ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the "received" timestamp, which allows remote a...

CVE-2018-7184 is fixed in 3 products on 1 platform, first by ntp 1:4.2.8p10+dfsg-5ubuntu7.1, released March 7, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-7184
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0863
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 5, 2018

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ntp Ubuntu 18.04.6 LTS (bionic) | 1:4.2.8p10+dfsg-5ubuntu7.1 | [ntp 1:4.2.8p10+dfsg-5ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ntp-1-4.2.8p10-dfsg-5ubuntu7.1.md) | Mar 7, 2018 |
| Linux | ntpdate Ubuntu 18.04.6 LTS (bionic) | 1:4.2.8p10+dfsg-5ubuntu7.1 | [ntpdate 1:4.2.8p10+dfsg-5ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ntpdate-1-4.2.8p10-dfsg-5ubuntu7.1.md) | Mar 7, 2018 |
| Linux | sntp Ubuntu 18.04.6 LTS (bionic) | 1:4.2.8p10+dfsg-5ubuntu7.1 | [sntp 1:4.2.8p10+dfsg-5ubuntu7.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-sntp-1-4.2.8p10-dfsg-5ubuntu7.1.md) | Mar 7, 2018 |

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