Resource exhaustion in HPE Hpux-Ntp
CVE-2016-7426
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.124 (96.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.125 · newest: 0.124 · change: -0.001
Affected products
- HPE Hpux-Ntp
- NTP — versions 4.2.5, 4.2.8
- Canonical Ubuntu Linux — versions 12.04
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4, 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.3, 7.4, 7.5
- Red Hat Enterprise Linux Server Tus — versions 7.3, 7.6, 7.7
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- h20566.www2.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- usn.ubuntu.com/3707-2/ (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0252.html (vendor-advisory, Third Party Advisory)
- support.ntp.org/bin/view/Main/SecurityNotice (Release Notes, Vendor Advisory)
- nwtime.org/ntp428p9_release/ (Third Party Advisory)
- www.kb.cert.org/vuls/id/633847 (US Government Resource, Third Party Advisory, third-party-advisory)
- www.securitytracker.com/id/1037354 (VDB Entry, Third Party Advisory, vdb-entry)
- bto.bluecoat.com/security-advisory/sa139 (Third Party Advisory)
- support.ntp.org/bin/view/Main/NtpBug3071 (Mitigation, Issue Tracking, Vendor Advisory)
- security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-7426?
- CVE-2016-7426 is a high-severity vulnerability in HPE Hpux-Ntp, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2017-01-13.
- How severe is CVE-2016-7426?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-7426 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.