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Category:   Application (Generic)  >   ntp Vendors:   ntp.org
(IBM Issues Fix for IBM AIX) NTP Uses Weak Default Encryption Key and Weak RNG Seed
SecurityTracker Alert ID:  1031735
SecurityTracker URL:  http://securitytracker.com/id/1031735
CVE Reference:   CVE-2014-9293, CVE-2014-9294   (Links to External Site)
Date:  Feb 11 2015
Impact:   Disclosure of system information, Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.2.7p230
Description:   Two vulnerabilities were reported in NTP. A remote user can access and modify data.

A remote user with the ability to conduct a man-in-the-middle attack can obtain encrypted data and decrypt it.

When no auth key is specified in the configuration file, the system generates a 31-bit key using a weak randomization function [CVE-2014-9293]. Versions prior to 4.2.7p11 [January 2010] are affected.

Neel Mehta of the Google Security Team reported this vulnerability.

The system uses a week seed for ntp-keygen to genearte symmetric keys [CVE-2014-9294]. Versions prior to 4.2.7p230 are affected [Nov 2011].

Stephen Roettger of the Google Security Team reported this vulnerability.

Impact:   A remote user can access and modify data.
Solution:   IBM has issued a fix.

The IBM advisory is available at:

https://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc

Vendor URL:  support.ntp.org/bin/view/Main/SecurityNotice (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (AIX)
Underlying OS Comments:  5.3, 6.1, 7.1

Message History:   This archive entry is a follow-up to the message listed below.
Dec 20 2014 NTP Uses Weak Default Encryption Key and Weak RNG Seed



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