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LIN7-5569 : Security Advisory - ntp - CVE-2015-8140

Created: Jan 27, 2016    Updated: Sep 8, 2018
Resolved Date: Mar 25, 2016
Previous ID: SCP7-300
Found In Version: 7.0.0.12
Fix Version: 7.0.0.14
Severity: Standard
Applicable for: Wind River Linux 7
Component/s: Userspace

Description

The ntpq protocol is vulnerable to replay attacks. The sequence number being included under the signature fails to prevent replay attacks for two reasons. Commands that don't require authentication can be used to move the sequence number forward, and NTP doesn't actually care what sequence number is used so a packet can be replayed at any time. If, for example, an attacker can intercept authenticated reconfiguration commands that would. for example, tell ntpd to connect with a server that turns out to be malicious and a subsequent reconfiguration directive removed that malicious server, the attacker could replay the configuration command to re-establish an association to malicious server.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8140 

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