CVE-2019-6444: ntpsec Out-of-bounds Read
Vulnerability summary
CVE-2019-6444 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in ntpsec. EPSS estimates a 45.72% chance of exploitation in the next 30 days, higher than 98.7% of scored vulnerabilities. 3 public exploits are recorded.
Timeline
- 16-01-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
45.72%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
0.00 pp
From 45.72% on 19-09-2026
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 - 'ntp_control' Out-of-Bounds Read (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
