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CVE-2019-6444

An issue was discovered in NTPsec before 1.1.3. process_control() in ntp_control.c has a stack...

9.1 CriticalPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
High

Exploit likelihood

45.7%Up 41.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.1

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.

Record
CVE-2019-6444
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:P/I:N/A:P
Weakness
CWE-125
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-6444
Updated
2026-11-02
EUVDEUVD-2019-16005 No score

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.

Record
EUVD-2019-16005
Updated
2026-11-03
GitHub AdvisoriesGHSA-ggw9-jvx5-hggr 9.1

An issue was discovered in NTPsec before 1.1.3. process_control() in ntp_control.c has a stack...

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.

Record
GHSA-ggw9-jvx5-hggr
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSVALPINE-CVE-2019-6444 9.1

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.

Record
ALPINE-CVE-2019-6444
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-03
OSV 9.1

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.

Record
CVE-2019-6444
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-6444 9.1

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.

Record
DEBIAN-CVE-2019-6444
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-6444 9.1

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.

Record
UBUNTU-CVE-2019-6444
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2019:0082-1 No score

Security update for ntpsec

This update for ntpsec to version 1.1.3 fixes the following issues:

Security issues fixed:

  • CVE-2019-6442: Fixed a out of bounds write via a malformed config request (boo#1122132)
  • CVE-2019-6443: Fixed a stack-based buffer over-read in the ctl_getitem function (boo#1122144)
  • CVE-2019-6444: Fixed a stack-based buffer over-read in the process_control function (boo#1122134)
  • CVE-2019-6445: Fixed a NULL pointer dereference in the ctl_getitem function (boo#1122131)
Record
openSUSE-SU-2019:0082-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ntpsec
Alpine:v3.10
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.11
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.12
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.13
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.14
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.15
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.16
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.17
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.18
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.19
 before 1.1.3-r0
1.1.3-r0
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Affected packages
PackageAffectedFixed
ntpsec
Alpine:v3.20
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.21
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.22
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.23
 before 1.1.3-r0
1.1.3-r0
ntpsec
Alpine:v3.24
 before 1.1.3-r0
1.1.3-r0
ntpsec
Debian:12
 before 1.1.3+dfsg1-1
1.1.3+dfsg1-1
ntpsec
Debian:13
 before 1.1.3+dfsg1-1
1.1.3+dfsg1-1
ntpsec
Debian:14
 before 1.1.3+dfsg1-1
1.1.3+dfsg1-1
ntpsec
Ubuntu:18.04:LTS
 before 1.1.0+dfsg1-1ubuntu0.2, plus listed versions
1.0.0+dfsg1-11.0.0+dfsg1-31.1.0+dfsg1-11.1.0+dfsg1-1ubuntu0.1
1.1.0+dfsg1-1ubuntu0.2

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBNTPsec 1.1.2 - 'ntp_control' Out-of-Bounds Read (PoC)2019-01-16

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-6444 is a critical vulnerability (CVSS 9.1) in Ntpsec, published January 16, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 45.7%, the 98th percentile. Fixed in ntpsec 1.1.3-r0.

References

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