Improper input validation in FreeBSD
CVE-2016-9042
An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (90.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- FreeBSD — versions 10.0, 11.0
- HPE Hpux-Ntp
- NTP — versions 4.2.8
- Siemens Simatic Net Cp 443-1 Opc Ua
- Siemens Simatic Net Cp 443-1 Opc Ua Firmware
- Talos Network Time Protocol — versions NTP 4.2.8p9
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1038123 (VDB Entry, Third Party Advisory, vdb-entry)
- security.FreeBSD.org/advisories/FreeBSD-SA-17:03.ntp.asc (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1039427 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/97046 (Permissions Required, VDB Entry, Third Party Advisory, vdb-entry)
- www.ubuntu.com/usn/USN-3349-1 (vendor-advisory)
- www.securityfocus.com/archive/1/archive/1/540403/100/0/threaded (mailing-list)
- seclists.org/fulldisclosure/2017/Nov/7 (mailing-list)
- www.securityfocus.com/archive/1/540403/100/0/threaded (mailing-list)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- seclists.org/fulldisclosure/2017/Sep/62 (mailing-list)
Frequently asked questions
- What is CVE-2016-9042?
- CVE-2016-9042 is a medium-severity vulnerability in FreeBSD, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2018-06-04.
- How severe is CVE-2016-9042?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-9042 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.