Out-of-bounds Read Affecting ntpsec package, versions <1.1.3+dfsg1-1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-NTPSEC-18496107
- published1 Aug 2026
- disclosed16 Jan 2019
Introduced: 16 Jan 2019
CVE-2019-6443 (opens in a new tab)How to fix?
Upgrade Echo:latest ntpsec to version 1.1.3+dfsg1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ntpsec package and not the ntpsec package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2019-6443
- https://dumpco.re/blog/ntpsec-bugs
- https://dumpco.re/bugs/ntpsec-oobread1
- https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
- https://www.exploit-db.com/exploits/46175/
- https://www.exploit-db.com/exploits/46175
- https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2019/CVE-2019-6443.yaml