CVE-2019-6442: ntpsec Out-of-bounds Write
Vulnerability summary
CVE-2019-6442 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in ntpsec. EPSS estimates a 13.71% chance of exploitation in the next 30 days, higher than 96.4% of scored vulnerabilities. 3 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 16-01-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
13.71%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 13.71% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
3 foundExploit Reference (dumpco.re)
Maturity: unknown
Exploit Reference (dumpco.re)
Maturity: unknown
NTPsec 1.1.2 - 'config' (Authenticated) Out-of-Bounds Write Denial of Service (PoC)
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- ntpsec< 1.1.3+dfsg1-1
Ntpsec1 product
- ntpsec< 1.1.3
Ubuntu1 product
- ntpsec< 1.1.0+dfsg1-1ubuntu0.2
3 vendors · 3 products
References
7 links- github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWSX Refsource MISCREPORTRelease NotesThird Party Advisory
