Vulnerability Description
An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ntp | Ntp | <= 4.2.8 |
Related Weaknesses (CWE)
References
- http://rhn.redhat.com/errata/RHSA-2016-1552.html
- http://www.debian.org/security/2016/dsa-3629
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.h
- http://www.securityfocus.com/bid/88276
- http://www.securitytracker.com/id/1035705
- http://www.talosintelligence.com/reports/TALOS-2016-0081/MitigationTechnical DescriptionThird Party Advisory
- https://access.redhat.com/errata/RHSA-2016:1141
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171004-0002/
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
- https://www.arista.com/en/support/advisories-notices/security-advisories/1332-se
FAQ
What is CVE-2016-1547?
CVE-2016-1547 is a vulnerability with a CVSS score of 5.3 (MEDIUM). An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a vic...
How severe is CVE-2016-1547?
CVE-2016-1547 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-1547?
Check the references section above for vendor advisories and patch information. Affected products include: Ntp Ntp.