Buffer overflow in NTP
CVE-2017-6451
The mx4200_send function in the legacy MX4200 refclock in NTP before 4.2.8p10 and 4.3.x before 4.3.94 does not properly handle the return value of the snprintf function, which allows local users to execute arbitrary code via unspecified vectors, which trigger an out-of-bounds memory write.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- NTP — versions 4.2.8, 4.3.0, 4.3.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.ntp.org/bin/view/Main/NtpBug3378 (Patch, Vendor Advisory)
- www.securitytracker.com/id/1038123 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/97058 (VDB Entry, Third Party Advisory, vdb-entry)
- support.apple.com/HT208144
- www.securitytracker.com/id/1039427 (vdb-entry)
- support.ntp.org/bin/view/Main/SecurityNotice (Vendor Advisory)
- support.hpe.com/hpsc/doc/public/display
Frequently asked questions
- What is CVE-2017-6451?
- CVE-2017-6451 is a high-severity vulnerability in NTP, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2017-03-27.
- How severe is CVE-2017-6451?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-6451 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.