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Category:   Device (Router/Bridge/Hub)  >   Brocade Switch Vendors:   Brocade Communications Systems
(Brocade Communications Systems Issues Fix for Brocade 5400 and 5600 vRouters) ntp Multiple Flaws Let Remote Users Deny Service, View Files, and Bypass Authentication to Modify the Time
SecurityTracker Alert ID:  1035757
SecurityTracker URL:  http://securitytracker.com/id/1035757
CVE Reference:   CVE-2015-7704   (Links to External Site)
Date:  May 6 2016
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Brocade 5400 and 5600 vRouters
Description:   Multiple vulnerabilities were reported in ntp. A remote user can view files on the target system. A remote user can cause denial of service conditions on the target system. A remote user can bypass authentication. A remote user can modify the time on the target system. Brocade 5400 and 5600 vRouters are affected.

A remote user can trigger a memory leak in CRYPTO_ASSOC [CVE-2015-7701].

A remote user can send AutoKey messages with a specially crafted AutoKey data packet length value to cause denial of service conditions [CVE-2015-7691, CVE-2015-7692, CVE-2015-7702].

A remote user can overwrite "pidfile" and "driftfile" configuration file directives [CVE-2015-7703].

A remote user can supply specially crafted data to cause denial of service conditions [CVE-2015-7704, CVE-2015-7705].

A remote user can trigger a mode 7 loop counter integer overflow in ntpd [CVE-2015-7848].

A remote user can trigger a use-after-free memory error in the processing of trusted keys [CVE-2015-7849].

A remote user can exploit a logfile-keyfile configuration flaw to cause denial of service conditions [CVE-2015-7850].

A remote user can exploit a directory traversal flaw in ntpd saveconfig [CVE-2015-7851].

A remote user can trigger a memory corruption error in the ntpq atoascii() function [CVE-2015-7852].

A remote user can supply specially crafted reference clock data to trigger a buffer overflow [CVE-2015-7853].

A remote user can supply a specially crafted password value to trigger a memory corruption error [CVE-2015-7854].

A remote user can send a specially crafted control packet message to exploit a flaw in decodenetnum() to cause denial of service conditions [CVE-2015-7855].

A remote user can exploit a flaw in the crypto-NAK() function to bypass symmetric association authentication [CVE-2015-7871].

Cisco ASIG, IDA, Cisco TALOS, Tenable, RedHat, OpenVMS, and Boston University reported these vulnerabilities.

Impact:   A remote user can modify time on the target system.

A remote user can view files on the target system.

A remote user can cause denial of service conditions.

A remote user can bypass authentication on the target system.

Solution:   Brocade Communications Systems has issued a fix for CVE-2015-7704 for Brocade 5400 and 5600 vRouters (5400 vRouter 6.7R12 (ETA: May/2016); 5600 vRouter 4.1R1).

The Brocade Communications Systems advisory is available at:

http://www.brocade.com/content/dam/common/documents/content-types/security-bulletin/brocade-security-advisory-2016-005.pdf

Vendor URL:  www.brocade.com/content/dam/common/documents/content-types/security-bulletin/brocade-security-advisory-2016-005.pdf (Links to External Site)
Cause:   Access control error, Boundary error, Input validation error

Message History:   This archive entry is a follow-up to the message listed below.
Oct 23 2015 ntp Multiple Flaws Let Remote Users Deny Service, View Files, and Bypass Authentication to Modify the Time



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