What’s Vulnerable › Vulnerabilities

CVE-2019-6444

• Severity: critical (CVSS 9.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 45.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-01-16 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in NTPsec before 1.1.3. process_control() in ntp_control.c has a stack-based buffer over-read because attacker-controlled data is dereferenced by ntohl() in ntpd.

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-oobread2
• https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
• https://www.exploit-db.com/exploits/46176/
• https://dumpco.re/blog/ntpsec-bugs
• https://dumpco.re/bugs/ntpsec-oobread2
• https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
• https://www.exploit-db.com/exploits/46176/

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