What’s Vulnerable › Vulnerabilities

CVE-2019-6442

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-01-16 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• ntpsec: before 1.1.3 — fixed in 1.1.3

How to fix

Upgrade to a fixed version: ntpsec 1.1.3. Check the vendor advisory for mitigations.

References

• https://dumpco.re/blog/ntpsec-bugs
• https://dumpco.re/bugs/ntpsec-authed-oobwrite
• https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
• 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
• https://www.exploit-db.com/exploits/46178/

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