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Category:   Application (Generic)  >   ntp Vendors:   ntp.org
(IBM Issues Fix for IBM AIX) ntp Bugs Let Remote Users Deny Service, Obtain Potentially Sensitive Information, and Bypass Access Controls in Certain Cases
SecurityTracker Alert ID:  1032743
SecurityTracker URL:  http://securitytracker.com/id/1032743
CVE Reference:   CVE-2014-9750   (Links to External Site)
Updated:  Oct 5 2015
Original Entry Date:  Jun 30 2015
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in ntp. A remote user can cause denial of service conditions. A remote user can obtain potentially sensitive information. A remote user can bypass access controls in certain cases.

A remote user can send a specially crafted 'vallen' parameter value to trigger a validation flaw in 'ntp_crypto.c' and obtain potentially sensitive information or cause the target ntpd service to crash [CVE-2014-9750].

Stephen Roettger of the Google Security Team, Sebastian Krahmer of the SUSE Security Team, and Harlan Stenn of Network Time Foundation reported this vulnerability.

A remote user may be able to spoof the ::1 source address via IPv6 to bypass IPv6-based access controls [CVE-2014-9751]. Some operating systems are affected, including Apple OS X and Linux.

Stephen Roettger of the Google Security Team reported this vulnerability.

Impact:   A remote user can cause denial of service conditions.

A remote user can obtain potentially sensitive information.

A remote user can bypass access controls in certain cases.

Solution:   IBM has issued a fix for CVE-2014-9750 for IBM AIX.

The IBM advisory is available at:

https://aix.software.ibm.com/aix/efixes/security/ntp4_advisory.asc

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

Message History:   This archive entry is a follow-up to the message listed below.
Feb 16 2015 ntp Bugs Let Remote Users Deny Service, Obtain Potentially Sensitive Information, and Bypass Access Controls in Certain Cases



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