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Category:   Device (Embedded Server/Appliance)  >   IBM Security Network Protection Vendors:   IBM
(IBM Issues Fix for IBM Security Network Protection) ntp Multiple Flaws Let Remote Users Spoof Messages, Obtain Potentially Sensitive Information, and Deny Service
SecurityTracker Alert ID:  1035373
SecurityTracker URL:  http://securitytracker.com/id/1035373
CVE Reference:   CVE-2015-8138   (Links to External Site)
Date:  Mar 22 2016
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.3.1, 5.3.2
Description:   Multiple vulnerabilities were reported in ntp. A remote user can cause denial of service conditions on the target system. A remote user can obtain potentially sensitive information on the target system. A remote user can impersonate ntp peers. IBM Security Network Protection is affected.

A remote user can conduct a replay attack against authenticated broadcast mode packets [CVE-2015-7973].

A remote authenticated user can exploit a key check flaw to impersonate a peer [CVE-2015-7974].

A remote user can send specially crafted data to trigger a buffer overflow in the nextvar() function in ntpq and cause the target service to crash [CVE-2015-7975].

A remote authenticated user can send an ntpq saveconfig command with specially crafted filename characters to cause unintended results [CVE-2015-7976].

A remote user can send a specially crafted ntpdc reslist command to trigger a null pointer dereference and cause the target service to crash [CVE-2015-7977].

A remote user can send a specially crafted reslist command to consume all available stack memory [CVE-2015-7978].

A remote user can send a specially crafted broadcast mode packet to cause the target broadcast client to tear down the association with the broadcast server [CVE-2015-7979].

A remote server can send a specially crafted packet with an origin timestamp of zero to bypass the timestamp validation check in certain cases [CVE-2015-8138].

A remote user can send specially crafted data to trigger an infinite loop in ntpq [CVE-2015-8158].

A remote user can trigger an origin leak in ntpq and ntpdc to obtain potentially sensitive information [CVE-2015-8139].

A remote user on the local network may be able to conduct replay attacks against ntpq [CVE-2015-8140].

Cisco ASIG reported these vulnerabilities.

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

A remote user can obtain potentially sensitive information on the target system.

A remote authenticated user can impersonate an ntp peer.

Solution:   IBM has issued a fix for CVE-2015-8138 for IBM Security Network Protection (5.3.1.8, 5.3.2.2).

The IBM advisory is available at:

http://www-01.ibm.com/support/docview.wss?uid=swg21979393

Vendor URL:  www-01.ibm.com/support/docview.wss?uid=swg21979393 (Links to External Site)
Cause:   Access control error, Authentication error, Boundary error

Message History:   This archive entry is a follow-up to the message listed below.
Jan 22 2016 ntp Multiple Flaws Let Remote Users Spoof Messages, Obtain Potentially Sensitive Information, and Deny Service



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