medium
5.9
CWE
362
Advisory Published
Updated

CVE-2016-4955: Race Condition

First published: Tue Jul 05 2016(Updated: )

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Siemens SIMATIC NET CP 443-1 OPC UA
NTP ntp>=4.2.0<4.2.8
NTP ntp>=4.3.0<4.3.93
NTP ntp=4.2.8
NTP ntp=4.2.8-p1
NTP ntp=4.2.8-p1-beta1
NTP ntp=4.2.8-p1-beta2
NTP ntp=4.2.8-p1-beta3
NTP ntp=4.2.8-p1-beta4
NTP ntp=4.2.8-p1-beta5
NTP ntp=4.2.8-p1-rc1
NTP ntp=4.2.8-p1-rc2
NTP ntp=4.2.8-p2
NTP ntp=4.2.8-p2-rc1
NTP ntp=4.2.8-p2-rc2
NTP ntp=4.2.8-p2-rc3
NTP ntp=4.2.8-p3
NTP ntp=4.2.8-p3-rc1
NTP ntp=4.2.8-p3-rc2
NTP ntp=4.2.8-p3-rc3
NTP ntp=4.2.8-p4
NTP ntp=4.2.8-p5
NTP ntp=4.2.8-p6
NTP ntp=4.2.8-p7
Oracle Solaris=10
Oracle Solaris=11.3
Suse Manager Proxy=2.1
SUSE OpenStack Cloud=5
Novell Suse Manager=2.1
openSUSE Leap=42.1
openSUSE openSUSE=13.2
SUSE Linux Enterprise Desktop=12-sp1
SUSE Linux Enterprise Server=11-sp2
SUSE Linux Enterprise Server=11-sp3
SUSE Linux Enterprise Server=11-sp4
SUSE Linux Enterprise Server=12-sp1
Siemens Simatic Net Cp 443-1 Opc Ua Firmware
Siemens SIMATIC NET CP 443-1 OPC UA

Remedy

http://support.ntp.org/bin/view/Main/NtpBug3043

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