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CVE-2019-6442

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out...

6.5 MediumPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

13.7%Up 9.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

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.

Record
CVE-2019-6442
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-6442
Updated
2026-11-02
EUVDEUVD-2019-16003 No score

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.

Record
EUVD-2019-16003
Updated
2026-11-03
GitHub AdvisoriesGHSA-x553-v9rp-pgh7 6.5

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out...

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.

Record
GHSA-x553-v9rp-pgh7
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-787
Updated
2026-11-02
OSVALPINE-CVE-2019-6442 6.5

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.

Record
ALPINE-CVE-2019-6442
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 6.5

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.

Record
CVE-2019-6442
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2019-6442 6.5

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.

Record
DEBIAN-CVE-2019-6442
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-6442 6.5

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.

Record
UBUNTU-CVE-2019-6442
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
OSVopenSUSE-SU-2024:11103-1 No score

libntpc1-1.2.1-1.2 on GA media

These are all security issues fixed in the libntpc1-1.2.1-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11103-1
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
ntpsec
openSUSE:Tumbleweed
 before 1.2.1-1.2
1.2.1-1.2

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBNTPsec 1.1.2 - 'config' (Authenticated) Out-of-Bounds Write Denial of Service (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-2019-6442 is a medium vulnerability (CVSS 6.5) in Ntpsec, published January 16, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 13.7%, the 96th percentile. Fixed in ntpsec 1.1.3-r0.

References

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