CVE-2018-7184 Denial of service in n/a

What is CVE-2018-7184?

CVE-2018-7184 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 6 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Which versions are affected by CVE-2018-7184?

It affects 10 products.

Products include Canonical Ubuntu Linux, Netapp Cloud Backup, Netapp Steelstore Cloud Integrated Storage, Ntp Ntp, Slackware Slackware Linux, Synology Diskstation Manager and 4 more.

How do I fix CVE-2018-7184?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-7184 being exploited?

There is no known exploitation of CVE-2018-7184 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-7184, GHSA-rf4v-73h8-p6f7, UBUNTU-CVE-2018-7184.