Out-of-bounds Write Affecting ntpsec package, versions <1.1.3-r0
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-ALPINE324-NTPSEC-17301682
- published11 Jun 2026
- disclosed16 Jan 2019
Introduced: 16 Jan 2019
CVE-2019-6442 (opens in a new tab)How to fix?
Upgrade Alpine:3.24 ntpsec to version 1.1.3-r0 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 Alpine.
See How to fix? for Alpine:3.24 relevant fixed versions and status.
An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6442
- https://security-tracker.debian.org/tracker/CVE-2019-6442
- https://www.exploit-db.com/exploits/46178/
- https://dumpco.re/blog/ntpsec-bugs
- https://dumpco.re/bugs/ntpsec-authed-oobwrite
- https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-6442
- https://www.exploit-db.com/exploits/46178