CVE-2019-6445

MEDIUM

ntpsec < 1.1.3 - Authenticated Denial of Service via NULL Pointer Dereference in ntp_control.c

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-6445. PoCs published by Magnus Klaaborg Stubman.

AI-analyzed exploit summary This PoC exploits a NULL pointer exception in ntpsec by sending a malformed UDP packet to trigger a crash. It targets versions 1.1.0 to 1.1.2 and requires authentication with Keyid 1 and password 'gurka'.

Description

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can cause a NULL pointer dereference and ntpd crash in ntp_control.c, related to ctl_getitem.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Magnus Klaaborg Stubman · pythondoslinux
https://www.exploit-db.com/exploits/46177

This PoC exploits a NULL pointer exception in ntpsec by sending a malformed UDP packet to trigger a crash. It targets versions 1.1.0 to 1.1.2 and requires authentication with Keyid 1 and password 'gurka'.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: ntpsec 1.1.0, 1.1.1, 1.1.2
Auth required
Prerequisites: Network access to the NTP server · Valid authentication credentials (Keyid 1, password 'gurka')
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46177/
Exploit, Third Party Advisory x_refsource_misc
https://dumpco.re/blog/ntpsec-bugs
Exploit, Third Party Advisory x_refsource_misc
https://dumpco.re/bugs/ntpsec-authed-npe

Scores

CVSS v3 6.5
EPSS 0.1408
EPSS Percentile 96.1%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
ntpsec/ntpsec < 1.1.3
Published Jan 16, 2019
Tracked Since Feb 18, 2026