Description

ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the "received" timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704.

Affected Products 23

References 10

• packetstormsecurity.com http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html
  Third Party AdvisoryVDB Entry
• support.ntp.org http://support.ntp.org/bin/view/Main/NtpBug3453
  Third Party Advisory
• securityfocus.com http://www.securityfocus.com/archive/1/541824/100/0/threaded
  Third Party AdvisoryVDB Entry
• securityfocus.com http://www.securityfocus.com/bid/103192
  Third Party AdvisoryVDB Entry
• security.freebsd.org https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc
  Third Party Advisory
• security.gentoo.org https://security.gentoo.org/glsa/201805-12
  Third Party Advisory
• security.netapp.com https://security.netapp.com/advisory/ntap-20180626-0001/
  Third Party Advisory
• support.hpe.com https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
• usn.ubuntu.com https://usn.ubuntu.com/3707-1/
  Third Party Advisory
• synology.com https://www.synology.com/support/security/Synology_SA_18_13
  Third Party Advisory

Remediation