Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Talos Network Time Protocol
NTP 4.2.8p9affected
References
- http://www.securitytracker.com/id/1038123 ↗
- https://security.FreeBSD.org/advisories/FreeBSD-SA-17:03.ntp.asc ↗
- http://www.securitytracker.com/id/1039427 ↗
- http://www.securityfocus.com/bid/97046 ↗
- http://www.ubuntu.com/usn/USN-3349-1 ↗
- http://www.securityfocus.com/archive/1/archive/1/540403/100/0/threaded ↗
- http://seclists.org/fulldisclosure/2017/Nov/7 ↗
- http://www.securityfocus.com/archive/1/540403/100/0/threaded ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KVLFA3J43QFIP4I7HE7KQ5FXSMJEKC6/ ↗
- http://seclists.org/fulldisclosure/2017/Sep/62 ↗
- http://www.securityfocus.com/archive/1/archive/1/540464/100/0/threaded ↗
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us ↗
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0260 ↗
- http://packetstormsecurity.com/files/142101/FreeBSD-Security-Advisory-FreeBSD-SA-17-03.ntp.html ↗
- https://kc.mcafee.com/corporate/index?page=content&id=SB10201 ↗
- https://support.apple.com/kb/HT208144 ↗
- https://support.f5.com/csp/article/K39041624 ↗
- https://bto.bluecoat.com/security-advisory/sa147 ↗
- http://packetstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.html ↗
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf ↗
- https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11 ↗