Improper input validation in FreeBSD

CVE-2016-9042

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.039 (89.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2016-9042?
CVE-2016-9042 is a medium-severity vulnerability in FreeBSD, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2018-06-04.
How severe is CVE-2016-9042?
Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2016-9042 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.