Out-of-bounds Read in Ntpsec

CVE-2019-6443

An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

Vulnerability class: Buffer Overflow

EPSS: 0.669 (99.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
  • cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
  • cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
  • cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)

Frequently asked questions

What is CVE-2019-6443?
CVE-2019-6443 is a critical-severity vulnerability in Ntpsec, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2019-01-16.
How severe is CVE-2019-6443?
Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2019-6443 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.