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Category:   Device (Router/Bridge/Hub)  >   Cisco NX-OS Vendors:   Cisco
Cisco Nexus 9000 Series Packet Validation Flaw Lets Remote Users Cause the Target Telnet Service to Crash
SecurityTracker Alert ID:  1038047
SecurityTracker URL:  http://securitytracker.com/id/1038047
CVE Reference:   CVE-2017-3878   (Links to External Site)
Date:  Mar 15 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9000 Series; 7.0(3)I3(0.170)
Description:   A vulnerability was reported in Cisco Nexus 9000 Series. A remote user can cause the target service to crash.

A remote user can send specially crafted telnet packets to the target telnet service to trigger a packet header validation flaw and cause the target service to restart, causing other telnet logins to fail.

Traffic flowing through the device is not affected.

The vendor has assigned bug ID CSCux46778 to this vulnerability.

Impact:   A remote user can cause the target service to crash.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nss

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nss (Links to External Site)
Cause:   State error

Message History:   None.


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