CVE-2019-6442
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 13.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 13.71% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 16 January 2019
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- ntpsec/ntpsec
- Source
- cve@mitre.org
EPSS moved from 10.6% on 21 September 2026 to 13.7% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://dumpco.re/blog/ntpsec-bugsExploit, Third Party Advisory
- https://dumpco.re/bugs/ntpsec-authed-oobwriteExploit, Third Party Advisory
- https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWSRelease Notes, Third Party Advisory
- https://www.exploit-db.com/exploits/46178/Exploit, Third Party Advisory, VDB Entry
- https://dumpco.re/blog/ntpsec-bugsExploit, Third Party Advisory
- https://dumpco.re/bugs/ntpsec-authed-oobwriteExploit, Third Party Advisory
- https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWSRelease Notes, Third Party Advisory
- https://www.exploit-db.com/exploits/46178/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.