Buffer overflow in Ntpsec
CVE-2019-6442
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.137 (96.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.137 · newest: 0.137 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/46178/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- dumpco.re/bugs/ntpsec-authed-oobwrite (Exploit, Third Party Advisory)
- dumpco.re/blog/ntpsec-bugs (Exploit, Third Party Advisory)
- github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2019-6442?
- CVE-2019-6442 is a medium-severity vulnerability in Ntpsec, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2019-01-16.
- How severe is CVE-2019-6442?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2019-6442 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.